How do you calculate 15% of an amount?

Multiply the amount by 15 and divide by 100, or simply multiply by 0.15. 15% of 200 is 30.

How do you calculate the percentage change between two numbers?

Subtract the starting value from the final one, divide by the starting value and multiply by 100. Going from 80 to 100 is a +25% change.

Calculators

Percentage calculator

Solve any percentage calculation in seconds: X% of an amount, what percentage one number is of another, increases and decreases, and the percentage change between two values.

What is X% of Y?

Result—

What percentage is X of Y?

Result—

Increase or decrease Y by X%

Increased—

Decreased—

Percentage change: from a starting value to a final value

Change—

How to calculate a percentage

To find X% of an amount, multiply the amount by X and divide by 100. For example, 15% of 200 is 200 × 15 ÷ 100 = 30. To find what percentage an amount is of a total, divide the part by the total and multiply by 100.

Percentage change compares a starting value with a final one: (final − start) ÷ start × 100. It is the formula used for price rises, discounts, sales growth or inflation figures.

Percentage calculator

How to calculate a percentage

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