Percentage Calculator
Work out a percentage of a number, express one number as a percentage of another, or measure a percentage increase or decrease between two values.
20% of 150
30
(20 ÷ 100) × 150 = 30
Formula: Result = (X ÷ 100) × Y
Frequently asked questions
- How do I calculate a percentage of a number?
- Divide the percentage by 100 and multiply by the number. 20% of 150 = (20 ÷ 100) × 150 = 30.
- How is percentage increase calculated?
- Subtract the old value from the new value, divide by the old value, then multiply by 100. From 100 to 125 is a 25% increase.
- Why does 200 → 150 show 25%?
- The drop of 50 is measured against the starting value of 200, so it is a 25% decrease.