Percentage Calculator

Two everyday percentage questions, side by side. Results update as you type.

X is what percent of Y

Find the share one number is of another.

Result—

What is X% of Y

Take a percentage of a number.

Result—

Worked example

25 is 12.5% of 200. Separately, 15% of 80 is 12. Use the left card for “what share is this?”, and the right card for “how much is this percent?”

How do I work out “X is what percent of Y”?: Divide X by Y, then multiply by 100. If Y is 0, there is no percentage to show — a number cannot be a share of nothing.
How do I work out “what is X% of Y”?: Multiply Y by X, then divide by 100. 15% of 80 is 80 × 0.15, which is 12.
Is this the same as a percentage increase?: No. This page answers “what share?” and “how much is this percent?”. To grow or shrink a starting amount, use the increase, decrease, or discount calculators.