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Percentage Calculator

Free percentage calculator. Find what percent one number is of another, calculate percentage increase or decrease, and work out percentage of a total.

What is X% of Y?

What is % of ?
= 30

X is what percent of Y?

is what % of ?
= 15%

Percentage change from X to Y

From to
= +25% increase

Our percentage calculator handles the three most common percentage problems in one place. Whether you need to find a percentage of a number, express one number as a percentage of another, or calculate the percentage change between two values, you can do it here instantly.

How to calculate a percentage of a number

To find what X% of Y is, multiply Y by X and divide by 100. For example, 15% of 200 = (200 × 15) ÷ 100 = 30.

How to find what percentage one number is of another

To express X as a percentage of Y, divide X by Y and multiply by 100. For example, 30 is what percent of 200? (30 ÷ 200) × 100 = 15%.

How to calculate percentage change

Percentage change = ((new value − old value) ÷ old value) × 100. A positive result is an increase; a negative result is a decrease. For example, from 80 to 100: ((100 − 80) ÷ 80) × 100 = +25%.

Common uses for percentage calculations

Discounts and sales: Find out how much you save when an item is 20% off.

Tax calculations: Calculate VAT, sales tax, or income tax on an amount.

Grade and score comparisons: Work out your score as a percentage of the total marks.

Finance and investment: Calculate interest, returns, or how much a portfolio has grown.

Statistics and data: Express proportions and changes as percentages for reporting.

Popular Percentage Calculations

5% of 50 = 2.5 5% of 100 = 5 5% of 150 = 7.5 5% of 200 = 10 5% of 250 = 12.5 5% of 500 = 25 5% of 1000 = 50 10% of 50 = 5 10% of 100 = 10 10% of 150 = 15 10% of 200 = 20 10% of 250 = 25 10% of 500 = 50 10% of 1000 = 100 15% of 50 = 7.5 15% of 100 = 15 15% of 150 = 22.5 15% of 200 = 30 15% of 250 = 37.5 15% of 500 = 75 15% of 1000 = 150 20% of 50 = 10 20% of 100 = 20 20% of 150 = 30 20% of 200 = 40 20% of 250 = 50 20% of 500 = 100 20% of 1000 = 200 25% of 50 = 12.5 25% of 100 = 25 25% of 150 = 37.5 25% of 200 = 50 25% of 250 = 62.5 25% of 500 = 125 25% of 1000 = 250 30% of 50 = 15 30% of 100 = 30 30% of 150 = 45 30% of 200 = 60 30% of 250 = 75 30% of 500 = 150 30% of 1000 = 300 50% of 50 = 25 50% of 100 = 50 50% of 150 = 75 50% of 200 = 100 50% of 250 = 125 50% of 500 = 250 50% of 1000 = 500

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