How Fraction Calculator works

Add, subtract, multiply or divide fractions and mixed numbers with exact simplification.

The formula

Fractions use integer numerator and denominator arithmetic, then reduce by their greatest common divisor.

A practical example

1/2 + 3/4 = 5/4 = 1 1/4 = 1.25.

Important limitations

Denominators must be non-zero. Decimal inputs are intentionally not converted into approximate fractions.

Frequently asked questions

Are results automatically simplified?

Yes. Results are reduced using exact integer arithmetic.

Can I enter mixed numbers?

Yes. Use a form such as 1 1/2 or -2 3/4.