Better Percentage Support

[ghost]

In which part of the interface would this feature applies?

[x] 1. Load your data
[ ] 2. Choose a chart
[ ] 3. Mapping
[x] 4. Customize
[ ] 5. Export

Is your feature request related to a problem? Please describe.
I need to be able to show percentages in the final chart.

Describe the solution you'd like
Either allow "25%" to be counted as number instead of string, or an option in customization to display numbers as percentages:
Input: ".25" ----> On Graph: "25%"

Describe alternatives you've considered
n/a

Additional context
n/a