DocomintFraction Calculator
Simplify a fraction or add, subtract, multiply, and divide two fractions, with the steps shown.
Built for the two most common fraction tasks: reducing an ugly fraction like 18/24 down to its simplest form, or combining two fractions with different denominators — the step students most often get stuck on, since it needs a shared denominator before the numerators can be added or subtracted at all.
Example: Adding 1/2 and 1/3 needs a common denominator of 6 first — 3/6 + 2/6 — before the numerators combine to 5/6. Enter 1, 2, 1, 3 in Add mode and it returns 5/6 directly, skipping the manual common-denominator step.
How it works
- Choose simplify, or an operation between two fractions
- Enter the numerator and denominator for each fraction
- The result — simplified — appears instantly, calculated on your device
Frequently asked questions
How do you simplify a fraction?
Divide both the numerator and denominator by their greatest common divisor (GCD). 18/24 has a GCD of 6, so dividing both by 6 gives the simplified fraction 3/4.
How do you add fractions with different denominators?
Convert both fractions to a common denominator first — usually the least common multiple of the two denominators — then add the numerators. 1/2 + 1/3 becomes 3/6 + 2/6 = 5/6.
Is my numbers uploaded anywhere?
No — Fraction Calculator runs entirely in your browser using JavaScript/WebAssembly. Your numbers is never sent to a server.