Percentage Calculator

Calculate any percentage, percentage change, markup, margin, discounts and fraction conversions.

Results

20% of 15030
150 + 20%180
150 - 20%120
150 is what % of 750.0020%

Percentage calculations are among the most common everyday math tasks. These tools cover the basics - what is X% of Y, what is the percentage change between two values - plus practical applications like markup vs margin analysis, discount pricing and fraction-to-percent conversion. Every tool shows the result instantly with related calculations.

Frequently asked questions

20% of 150 = 30. Multiply 150 by 0.20. To do this in your head: 10% = 15, double it = 30.

Percentage change = (New - Old) / Old × 100. If a stock goes from $80 to $100: (100 - 80) / 80 × 100 = +25% increase.

Markup is profit as a percentage of cost. Margin is profit as a percentage of price. A $60 cost and $100 price: 66.7% markup but only 40% margin.

Multiply the original price by (1 - discount/100). For 25% off $120: $120 × 0.75 = $90. You save $30.

Divide the numerator by the denominator and multiply by 100. For 3/8: 3 ÷ 8 = 0.375 × 100 = 37.5%.

All percentage tools

Percentage CalculatorPercentage Change CalculatorMarkup vs Margin CalculatorDiscount CalculatorFraction to Percent Calculator

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