Fix call of math.div

[fjaguado]

PR Details

Fix some math.div calls

Description

Problem on compiling Sass files on other projects importing this library

Related Issue

#894

Types of changes

• Docs change / refactoring / dependency upgrade
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• I have read the CONTRIBUTING document
• My code follows the code style of this project
• My change requires a change to the documentation
• I have updated the documentation accordingly (README.md for each UI component)
• I have added tests to cover my changes (at least 1 spec for each UI component with the same coverage as the master branch)
• All new and existing tests passed
• A new branch needs to be created from master to evolve previous versions
• Increase version in package.json following Semantic Versioning
• All UI components must be added into the showcase (at least 1 component with the default settings)
• Add the issue into the right project with the proper status (In progress)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 57.81%. Comparing base (b6cba23) to head (2ecb2cb).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #895   +/-   ##
=======================================
  Coverage   57.81%   57.81%           
=======================================
  Files         132      132           
  Lines        3741     3741           
  Branches      659      659           
=======================================
  Hits         2163     2163           
+ Misses       1469     1468    -1     
- Partials      109      110    +1     

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