Percentage Calculator
Calculate the percentage of a number, find percentage increase or decrease, and determine what percent one number is of another.
Calculation Type
What is Percentage% of Number?
Enter values above to calculate.
Three Percentage Calculations
1. What is X% of Y? Answer = Y × X ÷ 100. 2. X is what % of Y? Answer = (X ÷ Y) × 100. 3. Percent change from X to Y? Answer = [(Y − X) ÷ X] × 100.
Frequently Asked Questions
- Multiply the number by the percentage and divide by 100. Example: 25% of 80 = 80 × 25 ÷ 100 = 20.
- Percentage increase = [(new value − old value) ÷ old value] × 100. Example: from 50 to 75 → [(75−50)÷50] × 100 = 50% increase.
- Percentage difference = |value1 − value2| ÷ [(value1 + value2) ÷ 2] × 100. This is a symmetric measure used when neither value is a reference.