Percentage Calculator
Percent of a number
What Is a Percentage Calculator?
A percentage calculator finds what portion one number is of another, expressed per hundred. It is used daily for calculating discounts, tax amounts, salary increases, interest rates, and profit margins.
How to Calculate a Percentage
To find the percentage of a number, multiply the number by the rate and divide by 100.
Formula: Result = (Number × Rate) ÷ 100
Example: 20% of 500 = (500 × 20) ÷ 100 = 100
Quick tricks: For 10%, divide by 10. For 1%, divide by 100. For 25%, divide by 4. For 50%, divide by 2.
Common Uses of Percentage Calculations
- Shopping: Finding the sale price after a 30% discount
- Finance: Calculating monthly interest on savings
- Tax: Working out VAT or sales tax amounts
- Salary: Finding new pay after a raise
- Business: Calculating profit margins
- Statistics: Expressing survey results as percentages
Frequently Asked Questions
What is 18% of 1000?
1000 × 18 ÷ 100 = 180. So 18% of 1000 is 180.
How do I calculate a 25% tip?
Divide the bill by 4. Example: 25% of $80 = $80 ÷ 4 = $20.
What does a negative percentage mean?
A negative percentage indicates a decrease. For example, −10% means the value dropped by 10%.
Difference between percentage and percentile?
A percentage is a ratio out of 100. A percentile shows the relative standing within a dataset.