Percentage of a Number

A percent is a count of parts per hundred. 15% means 15/100. Multiply that decimal by the base. 0.5% of 200 is 1. 250% of 200 is 500. Negative percentages reverse the sign of the product.

Calculated Result

Percentage used
Base number
Formula
Calculation

Step 1

Step 2

Step 3

Swap exchanges the two inputs and recalculates. 200% of 15 is still 30, but 8% of 15 is not 15% of 8. Related: what percent is ยท formulas