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Select what to calculate: percentage of, increase/decrease, etc.
Percentage Calculator
Choose a calculation mode and enter your values
What is X% of Y?
Pro Tip
To calculate percentage increase: (New - Old) / Old × 100. Common mistake is dividing by New value instead of Old.
How to Use the Percentage Calculator
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Input the numbers for your calculation.
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Understanding Percentages
Percentages express proportions out of 100. They're essential for finance, statistics, discounts, grades, and comparing relative quantities.
Frequently Asked Questions
Divide part by total, multiply by 100. For example: 25/100 × 100 = 25%.
Percentage is out of 100. Percentile is your rank position - 90th percentile means you scored better than 90% of people.