diff --git a/README.md b/README.md
index a4b25ba..41e97af 100644
--- a/README.md
+++ b/README.md
@@ -15,6 +15,10 @@ You can access documentation in [Github Pydicts Wiki](https://github.com/turulom
 
 ## CHANGELOG
 
+### 0.10.0 (2023-12-08)
+- Improving str2decimal conversions. Changed type parameter to decimal_separator.
+- Added Percentage and Currency classes to manage this objects
+
 ### 0.9.0 (2023-12-04)
 - Added gettext support
 - Improved spanish translation
diff --git a/pydicts.epj b/pydicts.epj
index b465feb..3ee5a81 100644
--- a/pydicts.epj
+++ b/pydicts.epj
@@ -2,7 +2,7 @@
   "header": {
     "comment": "eric project file for project pydicts",
     "copyright": "Copyright (C) 2023 , ",
-    "saved": "2023-12-04, 19:59:27"
+    "saved": "2023-12-08, 09:36:20"
   },
   "project": {
     "AUTHOR": "",
@@ -76,20 +76,24 @@
       "pydicts/__init__.py",
       "pydicts/casts.py",
       "pydicts/classes.py",
-      "pydicts/devscripts.py",
+      "pydicts/currency.py",
       "pydicts/exceptions.py",
       "pydicts/lod.py",
       "pydicts/lod_xyv.py",
       "pydicts/lod_ymv.py",
       "pydicts/lol.py",
       "pydicts/myjsonencoder.py",
+      "pydicts/percentage.py",
+      "pydicts/poethepoet.py",
       "pydicts/pylatex.py",
       "pydicts/tests/__init__.py",
       "pydicts/tests/test_casts.py",
+      "pydicts/tests/test_currency.py",
       "pydicts/tests/test_lod.py",
       "pydicts/tests/test_lod_ymv.py",
       "pydicts/tests/test_lol.py",
       "pydicts/tests/test_myjsonencoder.py",
+      "pydicts/tests/test_percentage.py",
       "pydicts/tests/test_pylatex.py"
     ],
     "SOURCESDIR": "",
diff --git a/pydicts/__init__.py b/pydicts/__init__.py
index 10f9814..abab977 100644
--- a/pydicts/__init__.py
+++ b/pydicts/__init__.py
@@ -1,4 +1,4 @@
 from datetime import datetime
-__version__="0.9.0"
-__versiondatetime__= datetime(2023, 12, 4, 20, 0)
+__version__="0.10.0"
+__versiondatetime__= datetime(2023, 12, 8, 9, 37)
 __versiondate__=__versiondatetime__.date()
diff --git a/pydicts/currency.py b/pydicts/currency.py
new file mode 100644
index 0000000..7097743
--- /dev/null
+++ b/pydicts/currency.py
@@ -0,0 +1,143 @@
+from logging import error
+from sys import exit
+from decimal import Decimal
+
+## Class to manage currencies in officegenerator
+##
+## The symbol is defined by code with self.symbol()
+class Currency:
+    def __init__(self, amount=None,  currency=None) :
+        if amount==None:
+            self.amount=Decimal(0)
+        else:
+            self.amount=Decimal(str(amount))
+        if currency==None:
+            self.currency='EUR'
+        else:
+            self.currency=currency
+
+
+    def __add__(self, money):
+        """Si las divisas son distintas, queda el resultado con la divisa del primero"""
+        if self.currency==money.currency:
+            return self.__class__(self.amount+money.amount, self.currency)
+        else:
+            error("Before adding, please convert to the same currency")
+            raise "OdfMoneyOperationException"
+
+    def __sub__(self, money):
+        """Si las divisas son distintas, queda el resultado con la divisa del primero"""
+        if self.currency==money.currency:
+            return self.__class__(self.amount-money.amount, self.currency)
+        else:
+            error("Before substracting, please convert to the same currency")
+            raise "CurrencyOperationException"
+
+    def __lt__(self, money):
+        if self.currency==money.currency:
+            if self.amount < money.amount:
+                return True
+            return False
+        else:
+            error("Before lt ordering, please convert to the same currency")
+            exit(1)
+
+    ## Si las divisas son distintas, queda el resultado con la divisa del primero
+    ##
+    ## En caso de querer multiplicar por un numero debe ser despues. For example: money*4
+    def __mul__(self, money):
+        if money.__class__.__name__ in ("int",  "float", "Decimal"):
+            return self.__class__(self.amount*money, self.currency)
+        if self.currency==money.currency:
+            return self.__class__(self.amount*money.amount, self.currency)
+        else:
+            error("Before multiplying, please convert to the same currency")
+            exit(1)
+
+    def __truediv__(self, money):
+        """Si las divisas son distintas, queda el resultado con la divisa del primero"""
+        if self.currency==money.currency:
+            return self.__class__(self.amount/money.amount, self.currency)
+        else:
+            error("Before true dividing, please convert to the same currency")
+            exit(1)
+
+    def __repr__(self):
+        return self.string(2)
+
+    ## Returs a typical currency string
+    ## @param digits int that defines the number of decimals. 2 by default
+    ## @return string
+    def string(self,   digits=2):
+        return "{} {}".format(round(self.amount, digits), currency_symbol(self.currency))
+
+    def isZero(self):
+        if self.amount==Decimal(0):
+            return True
+        else:
+            return False
+
+    def isGETZero(self):
+        if self.amount>=Decimal(0):
+            return True
+        else:
+            return False
+
+    def isGTZero(self):
+        if self.amount>Decimal(0):
+            return True
+        else:
+            return False
+
+    def isLTZero(self):
+        if self.amount<Decimal(0):
+            return True
+        else:
+            return False
+
+    def isLETZero(self):
+        if self.amount<=Decimal(0):
+            return True
+        else:
+            return False
+
+    def __neg__(self):
+        """Devuelve otro money con el amount con signo cambiado"""
+        return self.__class__(-self.amount, self.currency)
+
+    def round(self, digits=2):
+        return round(self.amount, digits)
+
+
+## Returns the symbol of the currency
+def currency_symbol(currency):
+    if currency=="EUR":
+        return "€"
+    elif currency=="USD":
+        return "$"
+    elif currency in ["CNY",  "JPY"]:
+        return "¥"
+    elif currency=="GBP":
+        return "£"
+    elif currency=="u":
+            return "u"## Returns the symbol of the currency
+
+def currency_name(name):
+    if name=="EUR":
+        return "Euro"
+    elif name=="USD":
+        return "American Dolar"
+    elif name=="CNY":
+        return "Chinese Yoan"
+    elif name=="JPY":
+        return "Japanes Yen"
+    elif name=="GBP":
+        return "Pound"
+    elif name=="u":
+            return "Unit"
+            
+            
+def MostCommonCurrencyTypes():
+    return ['CNY', 'EUR', 'GBP', 'JPY', 'USD', 'u']
+
+
diff --git a/pydicts/locale/es.po b/pydicts/locale/es.po
index 7d5b36b..3af83ae 100644
--- a/pydicts/locale/es.po
+++ b/pydicts/locale/es.po
@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: TooManyFiles\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2023-12-04 20:05+0100\n"
+"POT-Creation-Date: 2023-12-08 09:39+0100\n"
 "PO-Revision-Date: 2020-04-03 08:54+0200\n"
 "Last-Translator: trabajo <turulomio@yahoo.es>\n"
 "Language-Team: Spanish <kde-i18n-doc@kde.org>\n"
@@ -20,7 +20,7 @@ msgstr ""
 "X-Generator: Lokalize 19.12.3\n"
 
 #, python-brace-format
-msgid "Method str2decimal couln't convert {0} ({1}) to a Decimal"
+msgid "Method str2decimal couln't convert {0} ({1}), after changing it to {2} to a Decimal"
 msgstr ""
 
 #, python-brace-format
@@ -58,7 +58,7 @@ msgid "I can't traspaso a None object"
 msgstr ""
 
 msgid "lol_print: This list of lists hasn't data to print"
-msgstr ""
+msgstr "lol_print: Esta lista de listas no tiene data para imprimir"
 
 msgid "lol_print: No data was printed due to you selected 0 rows"
 msgstr ""
diff --git a/pydicts/locale/es/LC_MESSAGES/pydicts.mo b/pydicts/locale/es/LC_MESSAGES/pydicts.mo
index 4f8dddc..d086462 100644
Binary files a/pydicts/locale/es/LC_MESSAGES/pydicts.mo and b/pydicts/locale/es/LC_MESSAGES/pydicts.mo differ
diff --git a/pydicts/locale/pydicts.pot b/pydicts/locale/pydicts.pot
index 974bf11..9e357b4 100644
--- a/pydicts/locale/pydicts.pot
+++ b/pydicts/locale/pydicts.pot
@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2023-12-07 17:52+0100\n"
+"POT-Creation-Date: 2023-12-08 09:40+0100\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -18,7 +18,7 @@ msgstr ""
 "Content-Transfer-Encoding: 8bit\n"
 
 #, python-brace-format
-msgid "Method str2decimal couln't convert {0} ({1}) to a Decimal"
+msgid "Method str2decimal couln't convert {0} ({1}), after changing it to {2} to a Decimal"
 msgstr ""
 
 #, python-brace-format
diff --git a/pydicts/percentage.py b/pydicts/percentage.py
new file mode 100644
index 0000000..7924e34
--- /dev/null
+++ b/pydicts/percentage.py
@@ -0,0 +1,115 @@
+from logging import warning
+from decimal import Decimal
+
+## Class to manage percentages in spreadsheets
+class Percentage:
+    def __init__(self, numerator=None, denominator=None):
+        self.setValue(self.toDecimal(numerator),self.toDecimal(denominator))
+
+    def toDecimal(self, o):
+        if o==None:
+            return o
+        if o.__class__.__name__ in ["Currency", "Money"]:
+            return o.amount
+        elif o.__class__.__name__=="Decimal":
+            return o
+        elif o.__class__.__name__ in ["int", "float"]:
+            return Decimal(o)
+        elif o.__class__.__name__=="Percentage":
+            return o.value
+        else:
+            warning (o.__class__.__name__)
+            return None
+
+    def __repr__(self):
+        return self.string()
+
+    def __neg__(self):
+        if self.value==None:
+            return self
+        return Percentage(-self.value, 1)
+
+    def __lt__(self, other):
+        if self.value==None:
+            value1=Decimal('-Infinity')
+        else:
+            value1=self.value
+        if other.value==None:
+            value2=Decimal('-Infinity')
+        else:
+            value2=other.value
+        if value1<value2:
+            return True
+        return False
+
+
+
+    def __add__(self,p):
+        return self.__class__(self.value+p.value,1)
+
+    def __sub__(self, p):
+        return self.__class__(self.value-p.value,1)
+
+    def __mul__(self, value):
+        if self.value==None or value==None:
+            r=None
+        else:
+            r=self.value*self.toDecimal(value)
+        return Percentage(r, 1)
+
+    def __truediv__(self, value):
+        try:
+            r=self.value/self.toDecimal(value)
+        except:
+            r=None
+        return Percentage(r, 1)
+
+    def setValue(self, numerator,  denominator):
+        try:
+            self.value=Decimal(numerator/denominator)
+        except:
+            self.value=None
+
+    def value_100(self):
+        if self.value==None:
+            return None
+        else:
+            return self.value*Decimal(100)
+
+    ## @return percentage float value
+    def float_100(self):
+        return float(self.value_100())
+
+    def string(self, rnd=2):
+        if self.value==None:
+            return "None %"
+        return "{} %".format(round(self.value_100(), rnd))
+
+    ## Returns if the percentage is valid. I mean it's value different of None
+    def isValid(self):
+        if self.value!=None:
+            return True
+        return False
+
+    def isGETZero(self):
+        if self.isValid() and self.value>=0:
+            return True
+        return False
+
+    def isGTZero(self):
+        if self.isValid() and self.value>0:
+            return True
+        return False
+
+    def isLTZero(self):
+        if self.isValid() and self.value<0:
+            return True
+        return False
+
+## Calculates porcentage to pass from a to b
+## @param a. Can be an object divisible and that can be substracted
+def percentage_between(a,b):
+    try:
+        return Percentage(b-a,a)
+    except:
+        return Percentage()
diff --git a/pydicts/tests/test_currency.py b/pydicts/tests/test_currency.py
new file mode 100644
index 0000000..91617f9
--- /dev/null
+++ b/pydicts/tests/test_currency.py
@@ -0,0 +1,3 @@
+from pydicts.currency import Currency
+def test_currency():
+    assert Currency(None).amount== 0
diff --git a/pydicts/tests/test_percentage.py b/pydicts/tests/test_percentage.py
new file mode 100644
index 0000000..d9d5c8f
--- /dev/null
+++ b/pydicts/tests/test_percentage.py
@@ -0,0 +1,3 @@
+from pydicts.percentage import Percentage
+def test_percentage():
+    assert Percentage(None).value== None
diff --git a/pyproject.toml b/pyproject.toml
index ad1296a..5cfa2cf 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "pydicts"
-version = "0.9.0"
+version = "0.10.0"
 description = "Module to use dictionaries in various situations"
 authors = ["turulomio <turulomio@yahoo.es>"]
 license = "GPL-3.0"