Percentage Calculator
Calculate percentages, compare values, and find percentage increases or decreases with this free online tool.
1. What is X% of Y?
2. X is what percent of Y?
3. Percentage Increase or Decrease
How to Calculate a Percentage
To calculate X% of a number, multiply the number by the percentage and divide by 100.
Formula: (Percentage × Number) ÷ 100
Example: 25% of 200 = (25 × 200) ÷ 100 = 50.
Percentage Change Formula
Percentage change = ((New Value − Original Value) ÷ Original Value) × 100.
A positive result means an increase. A negative result means a decrease.