How do I calculate a percentage of a number?

Multiply the number by the percentage and divide by 100. For example, 25% of 200 = (25 × 200) ÷ 100 = 50.

How do I find what percent one number is of another?

Divide the first number by the second and multiply by 100. For example, 50 is (50 ÷ 200) × 100 = 25% of 200.

How do I calculate percentage increase or decrease?

Subtract the old value from the new value, divide by the old value, and multiply by 100. A positive result is an increase; a negative result is a decrease.

Percentage Calculator

Work out percentages, percent-of values and percentage change instantly.

Pick a mode, enter numbers and tap Calculate.

How to Calculate Percentages

A percentage is a fraction out of 100. This calculator handles the three most common percentage questions:

X% of Y = (X × Y) ÷ 100

X is what % of Y = (X ÷ Y) × 100

% change = ((New − Old) ÷ Old) × 100

Examples

25% of 200 = (25 × 200) ÷ 100 = 50
50 is what % of 200 = (50 ÷ 200) × 100 = 25%
Change from 200 to 250 = ((250 − 200) ÷ 200) × 100 = +25%

Frequently Asked Questions

How do I add a percentage to a number?

Multiply the number by (1 + percentage ÷ 100). For example, 200 + 25% = 200 × 1.25 = 250.

What is the difference between percentage points and percent?

A change from 10% to 15% is a 5 percentage-point rise, but a 50% increase in relative terms.