Fraction Calculator

Add, subtract, multiply and divide fractions and mixed numbers, with simplified results and steps.

How do you add fractions with different denominators?

Cross-multiply to a common denominator, add the numerators, then simplify: a/b + c/d = (a×d + c×b) / (b×d). For example, 3/4 + 1 2/3 = 3/4 + 5/3 = (9 + 20)/12 = 29/12 = 2 5/12.

Accepted inputs

Fractions: 3/4, -7/8
Mixed numbers: 1 2/3
Decimals and whole numbers: 0.75, 5

Results are always reduced to lowest terms by dividing by the greatest common divisor.

Frequently asked questions

How do you divide fractions?

Multiply by the reciprocal: a/b ÷ c/d = a/b × d/c.

What is a mixed number?

A whole number plus a proper fraction, like 2 5/12.

Does it handle large numbers?

Yes, it uses exact integer arithmetic, so there are no rounding errors.