What is X% of Y?
Result100
What percentage is X of Y?
Percentage25%
Percentage change
Change25%
How to calculate a percentage
This percentage calculator handles three common calculations: finding a percentage of a number, finding what percentage one number represents of another, and calculating percentage change.
Percentage formula examples
To find 20% of 500, calculate 20 × 500 ÷ 100 = 100. To find what percentage 50 is of 200, calculate 50 ÷ 200 × 100 = 25%.
Percentage increase or decrease
Percentage change compares an original value with a new value. A positive result indicates an increase and a negative result indicates a decrease. This is useful for prices, marks, business figures, discounts and everyday calculations.