Percentage of a Number Calculator
Quickly find the value of any percentage from any number.
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How to Calculate a Percentage of a Number
Calculating a percentage of a number is one of the most useful mathematical skills in daily life. Whether you are trying to find the discount on a jacket, calculating sales tax, or determining a tip at a restaurant, the process is straightforward.
The Basic Formula
The standard formula for finding a percentage of a number is:
(Percentage / 100) × Number = Result
Step-by-Step Instructions
- Convert the percentage to a decimal: Divide the percentage by 100. For example, 25% becomes 0.25 (25 ÷ 100 = 0.25).
- Multiply by the whole number: Multiply that decimal by the number you are interested in. For example, if you want 25% of 80, multiply 0.25 by 80.
- The result: 0.25 × 80 = 20.
Real-World Examples
- Shopping Discounts: If a shirt costs 40 and is 15% off, calculate 15% of 40 (0.15 × 40 = 6). The discount is 6.
- Tipping: If your bill is 60 and you want to leave a 20% tip, calculate 20% of 60 (0.20 × 60 = 12). The tip is 12.
- Performance Grades: If an exam has 50 questions and you got an 80%, calculate 80% of 50 (0.80 × 50 = 40). You got 40 answers correct.
Common Percentage Benchmarks
| Percentage | Decimal Equivalent | Fraction Equivalent |
|---|---|---|
| 10% | 0.1 | 1/10 |
| 25% | 0.25 | 1/4 |
| 50% | 0.5 | 1/2 |
| 75% | 0.75 | 3/4 |