About this calculator
To add or subtract fractions, give them a common denominator: a/b + c/d = (ad + cb) / bd. To multiply, multiply the tops and the bottoms. To divide, flip the second fraction and multiply. The result is then divided by the greatest common divisor of its top and bottom to simplify it.
Worked example
3/4 + 2/3 = 9/12 + 8/12 = 17/12, which is 1 5/12 as a mixed number, or about 1.4167.
How to use the fraction calculator
- Enter the numerator 1.
- Enter the denominator 1.
- Choose the operation.
- Enter the numerator 2.
- Read the result — it updates as you type.
Frequently asked questions
What is 3/4 + 2/3?
3/4 + 2/3 = 9/12 + 8/12 = 17/12, which is 1 5/12 as a mixed number, or about 1.416667.
How do I simplify a fraction?
Divide the numerator and denominator by their greatest common divisor. 18/24 has a GCD of 6, so it simplifies to 3/4.