How to use the percentage calculator
- Choose the type of calculation, such as X% of Y or percentage increase.
- Enter the two numbers.
- Read the result and the steps below it, then copy it.
Example: 15% of 80 is 15 ÷ 100 × 80 = 12. A price of 50 increased by 20% becomes 50 × 1.20 = 60, and a 20% discount on 50 gives 40.
Frequently asked questions
How do I calculate a percentage of a number?
Divide the percentage by 100 and multiply by the number. For 15% of 80, that is 0.15 × 80 = 12.
How do I find the percentage change between two numbers?
Subtract the old value from the new one, divide by the old value and multiply by 100. Going from 50 to 60 is a 20% increase.
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