Fraction to Percent Calculator
Enter any fraction — numerator over denominator — to instantly get the percentage and decimal equivalent. Works for proper fractions, improper fractions, and mixed number conversions. For the reverse — entering a percentage to find the original value — use the reverse percentage calculator. To see what percentage one number is of another as whole numbers, use the X is what percent of Y calculator.
When to use this calculator
Use this when you have a fraction (a score like 17/20, a ratio like 3/8, or a proportion like 2/3) and need to express it as a percentage. Common in test scoring, recipe scaling, finance ratios, and probability.
Percentage
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Decimal
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Results are instant — nothing is stored and no account is needed.
Related Calculators
How to Calculate
- Enter the numerator (top number) in the first field.
- Enter the denominator (bottom number) in the second field.
- See the percentage and decimal instantly.
Formula
Divide the top number by the bottom number to get the decimal, then multiply by 100 to convert to a percentage. For 3/8: 3 ÷ 8 = 0.375, then 0.375 × 100 = 37.5%.
Examples
1/2
50%
3/4
75%
3/8
37.5%
2/3
66.67%
Use Cases
- Converting test scores (e.g. 17/20) to a percentage grade
- Expressing probability or odds as a percentage
- Converting financial ratios to percentage form
- Recipe and measurement conversions
- Checking what percentage of a target has been reached
FAQ
What is 3/8 as a percentage?
3/8 as a percentage is 37.5%. Calculation: (3 ÷ 8) × 100 = 37.5.
What is 5/6 as a percentage?
5/6 as a percentage is 83.33% (recurring). Calculation: (5 ÷ 6) × 100 = 83.333...
What is 7/8 as a percentage?
7/8 as a percentage is 87.5%. Calculation: (7 ÷ 8) × 100 = 87.5.
What is 2/3 as a percentage?
2/3 as a percentage is 66.67% (recurring). Calculation: (2 ÷ 3) × 100 = 66.666...
How do I convert a fraction to a percentage without a calculator?
Divide the numerator by the denominator, then multiply by 100. For fractions with denominators of 2, 4, 5, 10, 20, or 25, you can often convert to an equivalent fraction with denominator 100 directly — for example, 3/4 = 75/100 = 75%.
What is the difference between a fraction and a percentage?
A fraction expresses a ratio as numerator/denominator (e.g. 3/4). A percentage expresses it as parts per 100 (e.g. 75%). They represent the same value in different forms. If you need to work in the other direction — finding what fraction of a total something represents — use the X is what percent of Y calculator.