Math & numbers · Basic
Percentage Calculator
Calculate percentages three ways: find X% of a number, find what percent one number is of another, or compute the percentage change between two values.
Enter values above to see the result.
How it works
Calculates percentages in three modes: finding X% of a value, finding what percentage one number is of another, and calculating the percentage change between two values.
Step by step
- 1Choose your calculation mode from the dropdown.
- 2For 'X% of Y': multiply Y by X/100.
- 3For 'X is what % of Y': divide X by Y and multiply by 100.
- 4For '% change': divide (new − old) by old and multiply by 100.
Examples
What is 20% of 250?
20% of 250 = 250 × 20/100 = 50.
Inputs
- mode:
- of
- percent:
- 20
- ofValue:
- 250
Result
- result:
- 50
50 is what % of 200?
50 ÷ 200 × 100 = 25%.
Inputs
- mode:
- what
- part:
- 50
- whole:
- 200
Result
- result:
- 25%
% change from 200 to 250
(250 − 200) ÷ 200 × 100 = +25%.
Inputs
- mode:
- change
- fromVal:
- 200
- toVal:
- 250
Result
- result:
- +25.00%
Frequently asked questions
How do I calculate 20% of 250?▾
Multiply 250 by 0.20 (which is 20/100). 250 × 0.20 = 50.
How do I find the percentage change?▾
Divide (new value − old value) by the old value, then multiply by 100. A positive result is an increase; negative is a decrease.