About This Tool
This Percentage Calculator helps you solve the most common percentage problems instantly. Whether you need to find a discount, calculate exam marks, compare prices or track growth, this tool makes it simple and fast.
How To Use
- Select the type of calculation from the tabs above
- Enter your numbers in the fields
- Click Calculate to get your answer instantly
What Can You Calculate?
- % of Number — Find what 20% of 500 is (answer: 100)
- What % is it? — Find what percent 50 is of 200 (answer: 25%)
- % Change — Find how much something increased or decreased in percentage
- Reverse % — Find the original price before a discount was applied
Understanding Percentage Calculations
1. Percentage of a Number
This tells you what a certain percentage of a number equals. For example,
to find a 20% discount on a 500 rupee item, the calculation is
(20 ÷ 100) × 500 = 100. This is useful for discounts, tips, taxes and
finding a portion of any total amount.
2. What Percent One Number Is of Another
This tells you how much one number represents as a percentage of another.
For example, if you scored 50 marks out of 200, the calculation is
(50 ÷ 200) × 100 = 25%. This is useful for exam results, survey responses
and comparing two values.
3. Percentage Increase or Decrease
This tells you how much a value has grown or shrunk between two numbers.
For example, if a price changed from 400 to 500, the calculation is
((500 − 400) ÷ 400) × 100 = 25% increase. This is useful for tracking
salary raises, business growth, price changes and inflation.
4. Reverse Percentage (Finding the Original Price)
This tells you what a price was before a percentage discount was applied. For example,
if an item now costs 800 after a 20% discount, the original price is
800 ÷ (1 − 20/100) = 1000. This reverse percentage calculator is useful when you know
the final sale price and the discount percentage, but need to find the original price.
Frequently Asked Questions
Yes, this tool is completely free to use with no limits.
Yes, use the "% of Number" tab to find discount amounts, or the "Reverse %" tab to find the original price before a discount.
Use the Reverse Percentage tab. Enter the final price and the discount percentage, and the tool will calculate the original price for you.
Use the "What % is it?" tab. Enter both numbers and the tool instantly shows what percentage the first number is of the second.
Yes, this tool works perfectly on both mobile and desktop devices.