Percentage Calculator

Calculate percentages instantly: find X% of Y, what percent X is of Y, or percentage change. Free, fast, no signup.

What is X% of Y?

% of = —

X is what % of Y?

is what % of = —

Percentage change

From to = —

How to Calculate Percentages

A percentage is a fraction of 100. To find X% of a number, multiply the number by X/100. For example, 15% of 200 = 200 × 0.15 = 30.

To find what percentage one number is of another, divide the part by the whole and multiply by 100. For example, 25 is what percent of 200? 25 ÷ 200 × 100 = 12.5%.

Percentage change measures how much a value has increased or decreased relative to its original value: ((new − old) ÷ |old|) × 100.