What is X% of Y?
Example: 20% of 500 = 100
Result
Enter values to calculate
Percentage Calculator
Find a percent of a number, percent change, discount, markup, and profit margin instantly
Calculated locally in your browser.
X is what percent of Y?
Example: 50 is 25% of 200
Result
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Percentage increase
Example: 100 → 150 = 50% increase
Result
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Percentage decrease
Example: 200 → 150 = 25% decrease
Result
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Percentage difference
Example: 80 and 100 differ by 22.22%
Result
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Discount
Example: 20% off 1,000 = 800 (save 200)
Result
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Markup
Example: 30% markup on 100 = 130
Result
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Profit margin
Example: cost 100, sell 150 → 33.33% margin
Result
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Frequently asked questions
Common questions about the Percentage Calculator.
How do I calculate a percentage?
To find X% of Y, multiply Y by X and divide by 100. Example: 20% of 500 is 100. To find what percent X is of Y, divide X by Y and multiply by 100. Example: 50 is 25% of 200.
How do I calculate a discount?
Multiply the original price by the discount percent, then subtract that savings from the original. Example: 20% off 1,000 saves 200, so the final price is 800. ToolsArk also shows savings next to the final price.
How do I calculate percentage increase?
Subtract the original value from the new value, divide by the original, and multiply by 100. Example: 100 to 150 is a 50% increase. Percentage change from 0 is undefined.
How do I calculate percentage decrease?
Subtract the new value from the original, divide by the original, and multiply by 100. Example: 200 to 150 is a 25% decrease.
What is the difference between markup and profit margin?
Markup is the increase from cost: selling price = cost × (1 + markup%). Margin is profit as a share of selling price: (selling − cost) / selling. A 50% markup on 100 is a selling price of 150, which is a 33.33% profit margin.
How is percentage difference calculated?
ToolsArk uses the symmetric relative difference: the absolute gap divided by the average of the two values. 80 and 100 differ by 22.22%. This is not the same as percentage change from a starting value.
Does my data leave my device?
No. Every calculation runs in your browser. ToolsArk does not upload numbers or call an external math API.
Tags
calculatorpercentagemathdiscountmargin
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