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Percentage Calculator

Calculate percentages instantly. What is X% of Y? Percentage increase/decrease, markup, margin, and more. Free, fast, no signup.

Percentage Calculator

How to Calculate Percentages

A percentage is a number expressed as a fraction of 100. To find X% of Y, multiply Y by X/100. For example, 25% of 200 = 200 × 0.25 = 50.

Common Percentage Formulas

CalculationFormulaExample
X% of Y(X/100) × Y15% of 200 = 30
Percentage Change((New - Old) / Old) × 100(120-100)/100 = 20%
What % is X of Y?(X / Y) × 10030/200 = 15%
Increase by X%Y × (1 + X/100)200 × 1.15 = 230
Decrease by X%Y × (1 - X/100)200 × 0.85 = 170

Popular Percentage Calculations

CalculationAnswer
10% of 10010
15% of 20030
20% of 500100
25% of 1000250
50% of 200100
30% of 50001,500
5% of 10,000500
75% of 10075

Explore More Calculators

What is 10% of 100? = 10What is 15% of 200? = 30What is 20% of 500? = 100What is 25% of 1,000? = 250What is 30% of 200? = 60What is 50% of 300? = 150What is 5% of 10,000? = 500What is 75% of 100? = 75What is 10% of 500? = 50What is 20% of 1,000? = 200What is 15% of 300? = 45What is 33% of 1,000? = 330

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. For example, 20% of 150 = 150 × 20 / 100 = 30. You can also convert the percentage to a decimal first (20% = 0.20) and multiply.
How do I calculate percentage change?
Percentage change = ((New Value - Old Value) / Old Value) × 100. If a price goes from $80 to $100, the increase is ((100-80)/80) × 100 = 25%.
What is the difference between percent and percentage points?
Percent is a relative measure, while percentage points measure the absolute difference between two percentages. If a rate goes from 5% to 8%, it increased by 3 percentage points, but by 60% in relative terms.
How do I convert a fraction to a percentage?
Divide the numerator by the denominator, then multiply by 100. For example, 3/4 = 0.75 = 75%.
How do I calculate a percentage discount?
Multiply the original price by (1 - discount/100). For 30% off $80: $80 × 0.70 = $56. The discount amount is $80 × 0.30 = $24.