Formulas
X% of Y = X ÷ 100 × Y.
X as a % of Y = X ÷ Y × 100.
% change = (new − old) ÷ |old| × 100.
Frequently asked questions
Is percent change the same as percentage points?
No. Going from 10% to 12% is 2 percentage points, but a 20% increase.
Percentage Calculator
Percent of a number, what percent one number is of another, and percent change.
Your details
15% of 200
30