Fraction Simplifier — Reduce to Lowest Terms
One fraction, shown four ways.
Runs on your device What you paste is processed by your own browser. It is never sent to a server, and it is not stored anywhere after you leave the page.
Short answer
A fraction can be reduced to lowest terms for free in a web browser by dividing the numerator and denominator by their greatest common divisor. The result is shown as the reduced fraction, as a mixed number where there is a whole part to pull out, as a decimal, and as a percentage. The same tool runs backwards: a decimal such as 0.375 or a percentage such as 37.5% is converted into the exact fraction it represents.
At a glance
| Accepts | A fraction, decimal or percentage per line |
|---|---|
| Produces | Reduced fraction, mixed number, decimal and percentage |
| Processing | In your browser |
| Price | Free, no limits |
| Account | Not required |
All four forms are shown together because none of them is more the answer than the others. 3/8, 0.375 and 37.5% are the same quantity written for three different audiences, and which one is wanted depends entirely on where it is going next.
Decimal input is converted exactly rather than approximated: 0.375 becomes 375/1000 and reduces to 3/8. That works because a terminating decimal is a fraction over a power of ten by definition. A recurring decimal typed out to a few places cannot be recovered this way — 0.333 is 333/1000, not a third, and reporting otherwise would be guessing at what was meant.
How to use it
- 1
Type your fractions
One per line, as 42/56. A decimal like 0.375 or a percentage like 37.5% works too.
- 2
Convert
Each line comes back reduced, with the mixed number, decimal and percentage beside it.
- 3
Take the form you need
The reduced fraction for maths homework, the decimal for a spreadsheet, the percentage for a report.
- 4
Copy the result
Copy to the clipboard, or download it as a text file.
Frequently asked questions
How does reducing a fraction work?
Both numbers are divided by their greatest common divisor. For 42/56 that divisor is 14, which gives 3/4 — the same value with no factor left in common.
Can it turn a decimal into a fraction?
Yes, exactly, for any decimal that terminates. 0.375 is read as 375/1000 and reduced to 3/8.
Why does 0.333 not become 1/3?
Because 0.333 is not a third — it is 333/1000, which is what you typed. A recurring decimal cannot be identified from a few written digits, and a tool that assumed otherwise would silently change your number.
Does it accept fractions with decimals in them?
Yes. 1.5/2 is scaled up to 15/20 and reduced to 3/4, so a ratio taken from measurements works without being cleaned up first.