Rex says
The fast lane for the math you almost remember from school. Type the numbers, get the answer, move on with your day.
Try a scenario
Click to load — tweak from there.Inputs
Result
X% of Y
50.00
X is what % of Y
12.50%
% change from X to Y
700.00%
Psst — share this and help Rex grow
One click, a permanent link with your numbers baked in.
How to use this
- 1Enter x.
- 2Enter y.
- 3Read your x% of y on the right — it updates as you type.
- 4Hit Share to keep the scenario or send it to someone.
About this calculator
Three common percentage operations in one place — handy for tips, discounts, growth rates, and quick math.