Fraction Calculator
Add, subtract, multiply or divide two fractions and get the result in lowest terms, as a mixed number and as a decimal.
Reviewed by the WorldCalcs team · Methodology · Last reviewed: June 2026
Result
5/6
Mixed number: 5/6
Decimal: 0.833333
What is a fraction?
A fraction represents a part of a whole, written as one number over another: the top is the numerator and the bottom is the denominator. So 3/4 means three of four equal parts. A fraction is in lowest terms when the numerator and denominator share no common factor other than 1. This calculator adds, subtracts, multiplies and divides two fractions and gives the answer in lowest terms, as a mixed number, and as a decimal.
How fractions are calculated
To add or subtract, give both fractions a common denominator, combine the numerators, then simplify: 1/2 + 1/3 becomes 3/6 + 2/6 = 5/6. To multiply, multiply the numerators and the denominators straight across. To divide, flip the second fraction and multiply by its reciprocal. Always simplify the result by dividing the top and bottom by their greatest common factor; our GCF & LCM Calculator finds that factor.
Example
Add 1/2 and 1/3. The lowest common denominator is 6, so 1/2 = 3/6 and 1/3 = 2/6. Adding gives 3/6 + 2/6 = 5/6, which is already in lowest terms; as a decimal that is about 0.833333. Dividing instead, 1/2 divided by 3/4 flips the second fraction: 1/2 x 4/3 = 4/6 = 2/3.
All calculations happen in your browser. Nothing is sent, stored, or tracked.
Results are estimates and may contain errors — for general information only, not professional advice. Always verify before relying on them. Disclaimer
How to use
Enter the numerator and denominator of each fraction, pick an operation, and read the result.
The answer is shown three ways: simplified fraction, mixed number, and decimal. Denominators of zero are flagged instead of producing a result.