Percentage Calculator
Solve percentage of a number, percentage change, and percent increase/decrease instantly.
X% of Y
(X / 100) × Y
% of
50
X is what % of Y
(X / Y) × 100
is what % of
25%
% change from X to Y
((Y − X) / X) × 100
to
50%
X increased/decreased by Y%
X × (1 ± Y / 100)
± by%
+220 / −180
Find whole: X is Y% of what?
X / (Y / 100)
is% of what
200
About the Percentage Calculator
This tool solves the five percentage problems people run into most often, side by side: finding a percentage of a number, finding what percentage one number is of another, finding the percentage change between two numbers, applying a percentage increase or decrease, and finding the original whole when you only know a part and its percentage. Each panel updates live as you type and has its own copy button, so you can grab just the number you need.