How do I find X% of a number?

Multiply the number by X and divide by 100. For example, 20% of 150 = 150 × 20 ÷ 100 = 30.

How do I find what percent one number is of another?

Divide the part by the whole and multiply by 100. 30 out of 150 is 30 ÷ 150 × 100 = 20%.

How is percentage change calculated?

Subtract the old value from the new value, divide by the old value and multiply by 100.

Can the result be negative?

Yes. A negative percentage change means the value decreased.

Yes, all fields accept decimal numbers.

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Percentage Calculator— X% of Y, percent of a total, and % change.

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How to Use the Percentage Calculator

Choose the tab that matches your question. Enter the two numbers in the boxes and the answer appears immediately as you type. Use the increase/decrease tab to compare an old value with a new one, such as prices or marks.

Frequently Asked Questions

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How to Use the Percentage Calculator

Frequently Asked Questions

How do I find X% of a number?

How do I find what percent one number is of another?

How is percentage change calculated?

Can the result be negative?

Can I use decimals?

More free tools