Percentage Calculator

Work out what X% of a number is, what percent one number is of another, or the percentage change between two numbers.

Calculation

About this tool

The Percentage Calculator works out what X% of a number is, what percent one number is of another, and the percentage change between two numbers.

How to use it

Pick the type of percentage question you want to answer.
Enter the numbers.
Read the result instantly.

Tips and limits

Percentage change is calculated as (new − old) ÷ old × 100, so a negative result means a decrease. Remember that a 50% increase followed by a 50% decrease does not return you to the starting value.

Frequently asked questions

How do I find 15% of 200?

Multiply 200 by 0.15 to get 30.

How is percentage change calculated?

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

Can I use decimals?

Yes.