Fraction Calculator
Add, subtract, multiply or divide two fractions — the answer comes back in lowest terms and as a decimal.
Reviewed by the OmniCalc teamMethod verified 2026-07-01
5/6
= 0.8333333333
Result 5/6Show steps
- 1/2 + 1/3
- Common denominator 6: (3 + 2) / 6.
- Reduce to lowest terms: 5/6 = 0.8333333333.
How to use the fraction calculator
- 1Enter the numerator and denominator of the first fraction.
- 2Pick an operation — add, subtract, multiply or divide.
- 3Enter the second fraction and read the result in lowest terms, plus its decimal value.
Worked example
3/4 × 2/3 multiplies across to 6/12, which reduces to 1/2 (0.5). Open Show steps under the result to see the common denominator or reciprocal used for every operation.
Frequently asked questions
How do you add two fractions?
Put both over a common denominator, add the numerators, then reduce. For 1/2 + 1/3, the common denominator is 6: 3/6 + 2/6 = 5/6. This calculator does the common denominator and the reducing for you.
How is the result simplified?
The numerator and denominator are divided by their greatest common factor, so 4/8 becomes 1/2. The sign is kept on the numerator and the denominator stays positive.
Can I divide fractions?
Yes — dividing by a fraction is the same as multiplying by its reciprocal. a/b ÷ c/d = a/b × d/c. Choose ÷ and the calculator flips the second fraction automatically.