Fraction to Percent Calculator
Convert any fraction into a percentage and a decimal.
Results update as you type.
About this calculator
A fraction to percent calculator turns a fraction into a percentage by dividing the numerator by the denominator and multiplying by 100, and it also shows the equivalent decimal and the working, so you can see exactly how the percent was reached.
The method is two short steps: divide the top number by the bottom number to get a decimal, then multiply by 100 to express it out of a hundred. For example, 3/4 = 3 ÷ 4 = 0.75, and 0.75 × 100 = 75%. An improper fraction gives more than 100% — 5/4 = 1.25 = 125% — while a repeating decimal such as 1/3 = 0.3333… is shown rounded to 33.33%.
Converting a fraction to a percent is handy for reading test scores, discounts, probabilities and any proportion where a percentage is easier to compare than a raw fraction. To go the other way, write the percent over 100 and simplify.
Frequently asked questions
How do you convert a fraction to a percent?
Divide the top number by the bottom number, then multiply by 100. 3/4 = 0.75, and 0.75 × 100 = 75%.
What is 1/3 as a percent?
One third is 1 ÷ 3 = 0.3333…, which is 33.33% (a repeating decimal, so it is usually rounded).
What is 3/4 as a percent?
Divide 3 by 4 to get 0.75, then multiply by 100: 3/4 = 75%.
How do you convert a percent back to a fraction?
Write the percent over 100 and simplify. 75% = 75/100 = 3/4.
Can the percentage be more than 100%?
Yes. An improper fraction, where the numerator is larger than the denominator, gives over 100%. 5/4 = 1.25 = 125%.
Why is the percent sometimes rounded?
Fractions like 1/3 or 1/7 produce non-terminating repeating decimals, so the displayed percentage is rounded for readability.
API — use this calculator from code
Call this calculator as a free JSON endpoint — no key required. Send the field values below as query parameters or JSON. Read the full API docs →
Endpoint
GET https://calculator.free/api/v1/fraction-to-percent/curl
curl "https://calculator.free/api/v1/fraction-to-percent/?num=3&den=4"JavaScript fetch()
const r = await fetch(
"https://calculator.free/api/v1/fraction-to-percent/?" + new URLSearchParams({
"num": "3",
"den": "4"
}));
const data = await r.json();
console.log(data.results);Results are estimates for general guidance only, not financial, medical or tax advice.