％Percentage Calculator
A fast percentage calculator for everyday maths: work out X% of a number, what percentage one value is of another, and the percentage increase or decrease between two numbers.
How it works
- X% of Y = (X ÷ 100) × Y.
- X is what percent of Y = (X ÷ Y) × 100.
- Percentage change = ((new − old) ÷ old) × 100.
Frequently asked questions
How do I calculate a percentage of a number?
Divide the percentage by 100 and multiply by the number. For example, 20% of 150 = 0.20 × 150 = 30.
How do I calculate percentage increase?
Subtract the old value from the new value, divide by the old value, then multiply by 100.