Compute percentages

Helpers to quickly compute differents form of percentages

Yes, maths don't like me. Heavily inspired from the well named calculerpourcentage.fr

Convert percent to number

% of =
10
formula: (p * t) / 100

Convert number to percent

of =
10%
formula: (n * 100) / t

Percentage change

From to =
200% of variation
formula: ((t - n) / n) * 100