What modes does the calculator offer?

Three modes: (1) What is X% of Y? — e.g. what is 15% of 200? (2) X is what % of Y? — e.g. 30 is what % of 200? (3) Percentage change from X to Y — shows increase or decrease.

How is percentage change calculated?

Percentage change = ((new value - old value) / |old value|) × 100. A positive result is an increase; negative is a decrease.

Yes. All inputs accept decimal numbers.

Percentage Calculator

Calculate percentages: find X% of Y, what % X is of Y, or % change.

X (%)

Y (number)

15% × 200 = 30

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FAQ

What modes does the calculator offer?: Three modes: (1) What is X% of Y? — e.g. what is 15% of 200? (2) X is what % of Y? — e.g. 30 is what % of 200? (3) Percentage change from X to Y — shows increase or decrease.
How is percentage change calculated?: Percentage change = ((new value - old value) / |old value|) × 100. A positive result is an increase; negative is a decrease.
Can I use decimals?: Yes. All inputs accept decimal numbers.

Percentage Calculator offers three modes: find what X% of a number Y equals, calculate what percentage X is of Y, and compute the percentage change between two values. Each mode shows the result and the formula used.