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Percentage Calculator
Use the calculator below for common percentage and proportion calculations.
Proportion & Percentage Calculator
Quick calculations for percentages and proportions
Proportion
Rule of Three: A : B = C : X
X
15
Result
15
What is X% of Y?
Result
30
X is what % of Y?
Result
20%
Percentage change
Result
20% increase
Reverse percentage
Result
150
How to use this tool
Enter your values in the tool and get the result directly in your browser. No sign-up is required.