Percentage Calculator
Find a percentage of any number, then see what that value looks like added on or taken off. Handy for discounts, tips, tax, markups and quick mental-maths checks.
Inputs
Results
20% of 15030
150 increased by 20%180
150 decreased by 20%120
To find a percentage of a number, multiply the number by the percentage and divide by 100.
Frequently asked questions
How do I work out a percentage of a number?
Multiply the number by the percentage, then divide by 100. For example, 20% of 150 is 150 times 20 divided by 100, which equals 30.
How do I add a percentage to a value?
First find the percentage amount, then add it to the original value. Adding 20% to 150 means adding 30, giving a total of 180.
How do I subtract a percentage from a value?
Find the percentage amount and subtract it from the original value. A 20% reduction on 150 removes 30, leaving 120. This is the maths behind a sale discount.