Fractions Calculator
Fractions Calculator will perform basic arithmetic operations with fractions and mixed numbers.
Use this fraction calculator for adding, subtracting, multiplying and dividing fractions.
Addition and subtraction
Adding fractions
To add fractions containing unlike quantities (e.g. quarters and thirds), it is necessary to convert all amounts to like quantities. It is easy to work out the chosen type of fraction to convert to; simply multiply together the two denominators (bottom number) of each fraction.
Example Adding Fractions 
+ 
.
Least common multiple denominators lcm(8, 6)=24.
Subtracting fractions
The process for subtracting fractions is, in essence, the same as that of adding them: find a common denominator, and change each fraction to an equivalent fraction with the chosen common denominator.
Example Subtracting fractions 
- 
.
Least common multiple denominators lcm(16, 20)=80.
Multiplying and Dividing fractions
Multiplying fractions
To multiply fractions, multiply the numerators and multiply the denominators.
Example Multiplying fractions 
* 
.
Dividing fractions
To divide a fraction by a whole number, you may either divide the numerator by the number, if it goes evenly into the numerator, or multiply the denominator by the number.
Example Dividing fraction 
: 
.