Percentage Calculator
Calculate percentages with multiple methods. Find X% of Y, percentage increase/decrease, and more.
What is X% of Y?
What is% of
X is what % of Y?
is what % of
Common Percentage Formulas
Percentage of a Value
(P / 100) × Total
e.g., 15% of 200 = 30
Percentage Change
((New - Old) / Old) × 100
e.g., 50 to 75 = +50%
Frequently Asked Questions
How do you calculate the percentage of a number?
Multiply the number by the percentage fraction (P / 100). For example, 20% of 150 is calculated as 150 × (20 / 100) = 30.
How do you calculate percentage increase or decrease?
Subtract the original value from the new value, divide by the original value, and multiply by 100: [ (New - Original) / Original ] × 100.
Related Guide: See our Percentage Calculation Methods Guide for comprehensive everyday examples.