How do you simplify a fraction?

Divide numerator and denominator by their GCD (greatest common divisor) using the Euclidean algorithm.

Math

Fraction Calculator

Add, subtract, multiply, or divide two fractions. Enter whole numbers, numerators, and denominators, and get the answer in simplest form plus decimal.

Fraction rules cheat sheet

Add/Subtract: a/b + c/d = (ad + bc) / bd
Multiply: a/b × c/d = ac / bd
Divide: a/b ÷ c/d = a/b × d/c
Simplify: divide numerator and denominator by their GCD

Frequently asked questions

How do you add fractions?

Common denominator (LCM), convert each, add numerators, simplify.

How do you divide fractions?

Flip the second fraction and multiply: a/b ÷ c/d = a/b × d/c.

How to simplify?

Divide both by their GCD.