Percentage of a number
15 % of 200 = 30.
Percentage calculator
Five everyday percentage calculations in one place: a percentage of a number, the share one number represents of another, the percentage change between two values, and increasing or decreasing a value by a percentage.
Result
Fill in the fields to see the result.
Your last inputs are kept in this browser.
Results are provided for information. Check tax rates and legal requirements that apply to you.
How to use it
- Pick the calculation you need.
- Enter the numbers, in your usual format (1,234.5 or 1 234,5).
- Read the result; the difference is shown when it helps.
- Copy the result or switch calculation without losing your values.
Examples
Percentage change
From 80 to 100 is +25 %; from 100 to 80 is −20 %.
Frequently asked questions
How do I calculate the percentage change?
(new − old) ÷ old × 100. A rise from 80 to 100 is 20 ÷ 80 = 25 %.
Why is +20 % then −20 % not back to the start?
The second percentage applies to a different base. 100 + 20 % = 120, and 120 − 20 % = 96.
What percent is 30 of 200?
30 ÷ 200 × 100 = 15 %. Use the “X is what % of Y” mode.
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