Percentage Calculator
Three calculators in one: X% of a number, what percent, and percentage change.
What is X% of Y?
Result
30
X is what percent of Y?
%
20%
Percentage increase / decrease
Change
50%
How it works
- Pick the calculation you need.
- Enter your numbers.
- The result updates instantly.
FAQ
How do I calculate a percentage of a number?
Multiply the number by the percentage and divide by 100. For example, 20% of 150 = 150 × 20 ÷ 100 = 30.
How do I find what percent one number is of another?
Divide the part by the whole and multiply by 100. 30 out of 150 = 30 ÷ 150 × 100 = 20%.
How is percentage increase calculated?
Subtract the old value from the new value, divide by the old value and multiply by 100. From 50 to 75 is a 50% increase.
Can the percentage change be negative?
Yes. A negative result means a decrease, e.g. from 80 to 60 is −25%.