Percentage Calculator
Solve every common percentage problem in one place: percent of a number, percent change, reverse percentages and exam marks percentage.
Runs in your browser. Nothing is uploaded Free, no sign-up Works on mobile
Percentage
Total
20% of 250
50
20 ÷ 100 × 250
How to use Percentage Calculator
- Choose the type of percentage problem.
- Enter the two numbers.
- Read the answer and the formula used.
Frequently asked questions
How do I calculate a percentage of a number?
Multiply the number by the percentage and divide by 100. For example, 18% of 2,500 = 2,500 × 18 ÷ 100 = 450.
How do I calculate marks percentage?
Divide the marks obtained by the maximum marks and multiply by 100. 432 out of 500 is 432 ÷ 500 × 100 = 86.4%.
How do I calculate percentage increase?
Percentage change = (new value − old value) ÷ old value × 100. A price rising from ₹80 to ₹100 is a 25% increase.
What is the reverse percentage formula?
If X is Y% of a number, the number is X × 100 ÷ Y. For example, if 45 is 15% of a number, the number is 300.
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