Percentage Calculator
Three percentage tools in one. Find a percentage of a number, calculate percentage change between two values, or determine what percent one number is of another.
What is X% of Y?
This calculator provides estimates and is for informational purposes only.
Percentage Change (From → To)
This calculator provides estimates and is for informational purposes only.
X is what % of Y?
This calculator provides estimates and is for informational purposes only.
How to Calculate Percentages
Percentage of a number: Multiply the number by the percentage and divide by 100. Example: 15% of 200 = 200 × 15 / 100 = 30.
Percentage change: Subtract the old value from the new value, divide by the absolute value of the old value, and multiply by 100. A positive result means increase, negative means decrease.
What percent X is of Y: Divide X by Y and multiply by 100. Example: 25 is what % of 200? → 25/200 × 100 = 12.5%.