Fraction Calculator

How it works

To add or subtract, use a common denominator. To multiply, multiply straight across. To divide, multiply by the reciprocal. Finally, simplify by dividing by the greatest common divisor.

Formula

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

Example

3/4 + 2/3 = 9/12 + 8/12 = 17/12 = 1 5/12.

Assumptions & limitations

• Results are rounded for display.

Frequently asked questions