Percentage Calculator – Increase, Decrease & Discount Calculator
Calculate percentages instantly. Find percentage increase, decrease, discounts and more.
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How to Calculate Percentages
To calculate a percentage, multiply the number by the percentage and divide by 100.
Formula: Result = (% × Number) ÷ 100
Example: 20% of 150 = (20 × 150) ÷ 100 = 30
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Frequently Asked Questions
What is a percentage?
A percentage is a number or ratio expressed as a fraction of 100, denoted using the percent sign '%'. For example, 45% means 45 out of every 100.
How do you calculate percentage increase?
Percentage increase = ((new value − original value) ÷ original value) × 100. For example, going from 80 to 100 is a 25% increase.
How do you calculate percentage decrease?
Percentage decrease = ((original value − new value) ÷ original value) × 100. For example, going from 100 to 80 is a 20% decrease.
How do you calculate a discount percentage?
Discount percentage = ((original price − sale price) ÷ original price) × 100. For example, a $20 discount on a $100 item is a 20% discount.
How do you find what percent one number is of another?
Divide the part by the whole, then multiply by 100. For example, 30 is what percent of 150? (30 ÷ 150) × 100 = 20%.
How do you calculate X% of a number?
Multiply the number by the percentage and divide by 100. For example, 15% of 200 = (15 × 200) ÷ 100 = 30.