Percentage Calculator
Quick percentage math: percent of a number, percentage change between two numbers, and percent increase. Instant, free, and private.
20% of 150
30
Common uses
Percent of: calculating discounts, tips, tax, grades. Percent change: stock moves, price changes, year-over-year growth. Add percent: applying markup, VAT, or sales tax to a base price.
Frequently asked questions
Multiply the number by the percentage divided by 100. 20% of 150 = 150 x 0.20 = 30. Use the "X% of Y" mode above.
Divide the difference by the original value, then multiply by 100: ((new - old) / old) x 100. A negative result is a decrease.
Multiply the price by (1 + percentage/100). Adding 15% to $100 gives $100 x 1.15 = $115.