About the fraction calculator
To add or subtract fractions you need a common denominator; to multiply you multiply across the top and bottom; to divide you multiply by the reciprocal of the second fraction. This calculator does the steps and reduces the answer to lowest terms with the greatest common factor.
Formula
a/b + c/d = (ad + bc) ÷ bd. a/b × c/d = ac ÷ bd. a/b ÷ c/d = ad ÷ bc. Simplify by dividing top and bottom by their GCF.
Frequently asked questions
How do I add fractions with different denominators?
Convert both to a common denominator, add the numerators and simplify. For 1/2 + 1/3: 3/6 + 2/6 = 5/6.
How do I enter a mixed number?
Type the whole part in the first box, such as 2 for 2 1/4, then the numerator and denominator.