Percentage Calculator
Calculate percentages instantly. Enter values and see results in real time.
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How to Calculate Percentages
What is X% of Y?
Multiply Y by X, then divide by 100. For example, 15% of 200 = (200 x 15) / 100 = 30.
X is what percent of Y?
Divide X by Y, then multiply by 100. For example, 30 is what percent of 200? (30 / 200) x 100 = 15%.
Percentage increase or decrease
Subtract the old value from the new value, divide by the old value, then multiply by 100. A change from 80 to 100 = ((100 - 80) / 80) x 100 = 25% increase.
FAQ
What is a percentage?
A percentage is a way of expressing a number as a fraction of 100. The word comes from the Latin "per centum" meaning "by the hundred". For example, 25% means 25 out of 100.
Why are percentages useful?
Percentages make it easy to compare values of different sizes. They are used everywhere: discounts, taxes, interest rates, statistics, grades, and more.