Percentage Calculator
Enter your numbers to get the percentage results. Simple and instant.
Calculate what percent of given number is of another
Example: What percent is 25 of 200? (Answer: 12.5%)
Calculate a value from a percentage and total
Example: What is 15% of 200? (Answer: 30)
Calculate the original value when you know the percentage and result
Example: 30 is 15% of what number? (Answer: 200)
Calculate the percentage increase or decrease between two values
Example: From 100 to 150 is a 50% increase
Calculate the final price after applying a discount
Example: 20% off \$100 = \$80
FAQ: Percentage Calculation
1. What is a percentage?
A percentage is a way of showing a number out of 100.
For example, 25% means 25 out of every 100.
2. How do I calculate a percentage?
To work out a percentage, divide your number by the total, then multiply by 100. For example, 18 out of 20 as a percentage is (18 ÷ 20) × 100 = 90%.
3. How do I work out a percentage of a number?
Multiply the number by the percentage (as a decimal).
For example, 15% of 40 is 0.15 × 40 = 6.
4. How do I calculate a percentage increase or decrease?
Subtract the old value from the new value, divide by the old value, and multiply by 100.
If the result is positive, it’s a percentage increase; if negative, it’s a percentage decrease. For example:
From 50 to 65: ((65 − 50) ÷ 50) × 100 = 30% increase.
From 80 to 60: ((60 − 80) ÷ 80) × 100 = –25% decrease.
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