How to Use This Calculator

Mode 1: Find X% of Y

Calculate what a percentage of a number equals. For example, what is 15% of 200? Answer: 30. Useful for tips, discounts, and interest.

Result = (X / 100) * Y

Mode 2: Find the Ratio

Determine what percentage one number is of another. For example, 30 is what percent of 200? Answer: 15%. Great for grade calculations and progress tracking.

Result = (X / Y) * 100

Mode 3: Find the Whole

Reverse-calculate the original number given a part and its percentage. For example, 30 is 15% of what? Answer: 200. Handy for tax and commission calculations.

Result = X / (Y / 100)