How do I calculate percentage of a number?

To calculate a percentage of a number, multiply the number by the percentage and divide by 100. For example, 25% of 200 = (200 × 25) ÷ 100 = 50. Or use our calculator: enter the percentage and the number to get instant results.

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

To find what percentage X is of Y, divide X by Y and multiply by 100. For example, 50 is what percent of 200? (50 ÷ 200) × 100 = 25%. Use our calculator's "X is ?% of Y" tab for instant calculation.

How do I calculate percentage change?

Percentage change = ((New Value - Old Value) ÷ Old Value) × 100. If a price goes from $100 to $120, the percentage change is ((120-100) ÷ 100) × 100 = 20% increase.

How do I increase a number by a percentage?

To increase a number by a percentage, multiply the number by (1 + percentage/100). For example, to increase 100 by 20%: 100 × 1.20 = 120.

Percentage Calculator

Calculate percentages instantly with our free online percentage calculator. Find what percent one number is of another, calculate percentage change between values, and increase or decrease numbers by any percentage. Perfect for discounts, tips, grades, and more.