Fraction to Percent Calculator
Turn a fraction or mixed number into a percentage. Enter the numerator and denominator to see the percent, the decimal in between, and the fraction reduced to lowest terms.
- Decimal
- 0.375
- Fraction in lowest terms
- 3/8
Saved setups
Save a set of inputs you reuse — your usual rate, your loan, your room sizes — and load it back in one tap.
Your recent calculations
Results you calculate here are kept on this device so you can come back to them.
Formula
How to use it
- Enter the numerator (top number) and denominator (bottom number).
- Add a whole number only if you are converting a mixed number.
- Read the percent. Anything larger than 1 comes out above 100%.
Worked examples
3/8 as a percent
- Percent
- 37.5%
- Decimal
- 0.375
2/3 as a percent
- Percent
- 66.6667%
- Decimal
- 0.666667
18 out of 24 on a test
- Percent
- 75%
- Fraction in lowest terms
- 3/4
Fractions worth knowing by heart
1/2 = 50%, 1/3 = 33.33%, 2/3 = 66.67%, 1/4 = 25%, 3/4 = 75%, 1/5 = 20%, 1/6 = 16.67%, 1/8 = 12.5%, 3/8 = 37.5%, 5/8 = 62.5%, 7/8 = 87.5%, 1/10 = 10%, 1/20 = 5%.
Test scores and “out of” numbers
A score is a fraction: 17 out of 20 is 17/20 = 85%. When the denominator divides evenly into 100 you can scale instead of dividing — multiply 17/20 by 5/5 to get 85/100.
Questions people ask
What is 3/8 as a percent?
37.5%. 3 ÷ 8 = 0.375, and 0.375 × 100 = 37.5.
What is 2/3 as a percent?
66.67% when rounded to two decimal places. The exact value is 66.666…%.
What percent is 18 out of 24?
75%. 18/24 reduces to 3/4, which is 0.75.