Percentage Calculator

Work out a percentage of a number, what percent one number is of another, and the percentage change between two numbers.

What is X% of Y?

Percentage (%)

Of number

Result: 30

X is what percent of Y?

Number X

Number Y

Result: 15%

Percentage change from X to Y

From (X)

To (Y)

Increase: 25%
Difference: 20

What is Percentage Calculator?

A percentage is a number written as a part of 100. The word comes from the Latin per centum, meaning by the hundred. Percentages are used for discounts, taxes, grades, interest and statistics.

What this tool does

Answers the three most common percentage questions: what is X% of Y, X is what percent of Y, and what is the percentage change from X to Y.

How to use it

Find the question that matches yours.
Enter the two numbers.
Read the answer, which updates as you type.

Did you know?

A 20% rise followed by a 20% fall does not bring you back to the start: 100 becomes 120 and then 96.
A percentage change is always measured against the starting number.