diff --git a/splink/analyse_blocking.py b/splink/analyse_blocking.py
index c63208bd4d..9c2eb4fed6 100644
--- a/splink/analyse_blocking.py
+++ b/splink/analyse_blocking.py
@@ -115,11 +115,12 @@ def cumulative_comparisons_generated_by_blocking_rules(
         if output_chart:
 
             cumulative_sum += row
-            rr = round(calculate_reduction_ratio(cumulative_sum, cartesian), 3)
+            # Increase round threshold to capture more info on larger datasets
+            rr = round(calculate_reduction_ratio(cumulative_sum, cartesian), 6)
 
             rr_text = (
                 "The rolling reduction ratio with your given blocking rule(s) "
-                f"is {rr}. \nThis represents the reduction in the total number "
+                f"is {rr}. This represents the reduction in the total number "
                 "of comparisons due to your rule(s)."
             )
 
diff --git a/splink/files/chart_defs/blocking_rule_generated_comparisons.json b/splink/files/chart_defs/blocking_rule_generated_comparisons.json
index e0d709a6bc..9aa35d49c0 100644
--- a/splink/files/chart_defs/blocking_rule_generated_comparisons.json
+++ b/splink/files/chart_defs/blocking_rule_generated_comparisons.json
@@ -59,7 +59,7 @@
         "format": ","
       },
       {
-        "type": "quantitative",
+        "type": "nominal",
         "field": "reduction_ratio",
         "title": "Reduction Ratio (cumulative rows/cartesian product)"
       }
diff --git a/splink/linker.py b/splink/linker.py
index 28845adb6a..d1859284d4 100644
--- a/splink/linker.py
+++ b/splink/linker.py
@@ -2060,7 +2060,7 @@ def cumulative_comparisons_from_blocking_rules_records(
             >>>     and substr(l.dob,1,4) = substr(r.dob,1,4)"
             >>> ]
             >>>
-            >>> linker.cumulative_comparisons_from_blocking_rules_records(
+            >>> linker_settings.cumulative_comparisons_from_blocking_rules_records(
             >>>     blocking_rules
             >>>  )
 
@@ -2105,7 +2105,7 @@ def cumulative_num_comparisons_from_blocking_rules_chart(
             >>>     and substr(l.dob,1,4) = substr(r.dob,1,4)"
             >>> ]
             >>>
-            >>> linker.cumulative_num_comparisons_from_blocking_rules_chart(
+            >>> linker_settings.cumulative_num_comparisons_from_blocking_rules_chart(
             >>>     blocking_rules
             >>>  )