Percentage Calculator
Percent of a number, change and more.
What is X% of Y?
X is what percent of Y?
Percentage change from X to Y
How to use the Percentage Calculator
- 1 Choose the type of percentage problem.
- 2 Enter your numbers.
- 3 Read the answer and the worked formula.
Examples
- ▸ What is 15% of 200? → 30.
- ▸ What is the % increase from 80 to 100? → 25%.
Frequently asked questions
How do I calculate percentage change?
Subtract the old value from the new value, divide by the old value, then multiply by 100. A positive result is an increase, negative is a decrease.
What is X% of Y?
Convert the percent to a decimal by dividing by 100, then multiply by the number. For example, 15% of 200 is 0.15 × 200 = 30.
How do I find what percent one number is of another?
Divide the part by the whole and multiply by 100. So 30 out of 200 is 30 ÷ 200 × 100 = 15%.
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