Math

Fraction Calculator

Free fraction calculator for addition, subtraction, multiplication, and division with automatic simplification and decimal output.

Enter two fractions and choose an operation. The calculator simplifies the result using the greatest common divisor and also shows a decimal value.

Denominators cannot be zero. Division also requires a nonzero second numerator.

Frequently asked questions

How is a fraction simplified?

The numerator and denominator are divided by their greatest common divisor.

Can the calculator use negative fractions?

Yes. Enter a negative numerator or denominator; the result normalizes the sign.

Why must the denominator be nonzero?

Division by zero is undefined, so a fraction with a zero denominator is invalid.