Calculate a percentage of a value quickly with a simple formula and example.
To find a percentage of a number, convert the percentage to a decimal and multiply it by the number.
For 15% of 240, calculate 240 × 0.15 = 36.
How to Calculate Percentage Increase →
A percentage describes a part of a whole using 100 as the reference. This calculator answers the specific question “what is this percentage of that value?” It is useful for checking grades, budgets, statistics, discounts, and other everyday quantities.
Suppose a project budget is 2,400 and you want to reserve 12% for unexpected costs. Enter 2,400 as the value and 12 as the percent. The result is 288, so the reserve would be 288 in the same currency units as the budget.
A frequent mistake is confusing “15% of 200” with “200 increased by 15%.” The first is 30; the second is 230. When comparing two values, use the percentage-increase or percentage-decrease method instead of this calculator.
Use it when you already know the base value and the percentage and only need the resulting amount. For a change between an old and new value, see the percentage increase guide.