Fraction to percent calculator
Type a numerator and denominator and get the percentage and decimal equivalent instantly.
Fraction → percent
Example: 3/4 = 75%
Percentage
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Decimal
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How to convert a fraction to a percentage
- Divide the numerator by the denominator to get a decimal.
- Multiply the decimal by 100 and add the % sign.
Percentage = (Numerator ÷ Denominator) × 100
Example: 3/4 → 3 ÷ 4 = 0.75 → 75%. To go the other way, divide the percentage by 100 and simplify: 40% = 40/100 = 2/5.
Common fractions as percentages
| Fraction | Decimal | Percentage |
|---|---|---|
| 1/2 | 0.5 | 50% |
| 1/3 | 0.333… | 33.33% |
| 2/3 | 0.667… | 66.67% |
| 1/4 | 0.25 | 25% |
| 3/4 | 0.75 | 75% |
| 1/5 | 0.2 | 20% |
| 2/5 | 0.4 | 40% |
| 3/5 | 0.6 | 60% |
| 1/8 | 0.125 | 12.5% |
| 3/8 | 0.375 | 37.5% |
| 5/8 | 0.625 | 62.5% |
| 1/10 | 0.1 | 10% |
Examples
Test score
17/20 correct
85%
Attendance
23/25 days
92%
Recipe
2/3 of a cup
66.67%
Survey
45/72 said yes
62.5%
Frequently asked questions
How do I convert a fraction to a percent without a calculator?
If the denominator divides 100 evenly, scale it up: 3/4 = 75/100 = 75%. Otherwise do the long division and multiply by 100.
How do I convert a percent back to a fraction?
Write it over 100 and simplify: 40% = 40/100 = 2/5. For decimals like 12.5%, use 125/1000 = 1/8.
What is an improper fraction as a percentage?
Anything over 100%. For example 5/4 = 1.25 = 125%.
How do I convert a mixed number?
Turn it into an improper fraction first: 1¾ = 7/4 = 175%.
What about repeating decimals like 1/3?
1/3 is 0.333… which rounds to 33.33%. The calculator shows up to six decimal places for precision.