🔙Find original value before % was added/subtracted
🧮Fraction → Percentage
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How to Use the Percentage Calculator
Our free Percentage Calculator makes it easy to solve any percentage problem in seconds. Whether you're calculating tips, discounts, tax, grade scores, or interest rates — this tool handles all 7 common percentage calculations instantly.
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What is X% of Y?
Find a percentage of any number. Example: What is 15% of 200? → Answer: 30. Perfect for calculating tips, commissions, and discounts.
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Percentage Change
Calculate the percentage increase or decrease between two values. Widely used in finance, stock markets, and sales reports to track growth trends.
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Discount & Tax Calculator
Quickly calculate the final price after adding tax (VAT, GST) or subtracting a discount percentage. Great for shopping and budgeting.
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Reverse Percentage
Find the original price before a percentage was applied. For example, if you paid $85 after a 15% discount, the original price was $100.
Percentage Formula Reference
X% of Y(X ÷ 100) × Y
X is % of Y(X ÷ Y) × 100
% Change((New − Old) ÷ |Old|) × 100
Add %Value × (1 + % ÷ 100)
Subtract %Value × (1 − % ÷ 100)
Original ValueFinal ÷ (1 ± % ÷ 100)
Frequently Asked Questions
How do I calculate a percentage of a number?
To find X% of Y, multiply Y by X and divide by 100. Example: 20% of 150 = (150 × 20) ÷ 100 = 30.
How do I calculate percentage increase or decrease?
Subtract the old value from the new value, divide by the old value, then multiply by 100. Formula: ((New − Old) ÷ Old) × 100.
What is the difference between percentage and percentage points?
A percentage is a ratio expressed per 100. A percentage point is the arithmetic difference between two percentages. For example, going from 10% to 15% is an increase of 5 percentage points, but a 50% relative increase.
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🔢What is X% of Y?
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📊Percentage Change
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➕X plus Y% equals? (Tax)
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➖X minus Y% equals? (Discount)
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🔙Find original value before % was added/subtracted
🧮Fraction → Percentage
/
Use our percentage calculator to find percentages, calculate discounts, compute tax amounts, determine percentage changes, and convert fractions to percentages — all for free.
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