FAHAQ

Percentage Calculator

Work out percentages, shares and percent change.

Result
30

15% of 200 is 30

Free online percentage calculator. Find X% of a number, work out what percent one number is of another, or calculate the percentage increase or decrease between two values. Runs in your browser.

How to use the Percentage Calculator

  1. 01Pick a mode: X% of Y, X is what % of Y, or percent increase/decrease.
  2. 02Type your two numbers into the fields.
  3. 03The answer and a plain-English explanation appear instantly.
  4. 04Copy the result.

Frequently asked questions

How do I calculate a percentage of a number?

Use the ‘X% of Y’ mode. For example, 15% of 200 is (15 ÷ 100) × 200 = 30. The calculator does this automatically.

How is percentage increase calculated?

Percentage change is (new − old) ÷ |old| × 100. A move from 80 to 100 is a 25% increase; from 100 to 80 is a 20% decrease.