Fraction Calculator – Free Online

About this calculator

Enter two fractions and pick an operation. The answer is reduced to lowest terms and also shown as a mixed number and a decimal.

a/b + c/d = (ad + bc) ÷ bd | a/b ÷ c/d = ad ÷ bc

Worked example1/2 + 1/3 = 5/6 ≈ 0.8333.

How is a fraction simplified?

Divide numerator and denominator by their greatest common divisor.

What about mixed numbers?

Convert them first: 1 1/2 is 3/2.

Why can I not divide by 0/1?

Division by zero is undefined.