Type two fractions, choose an operation and this fraction calculator gives you the answer in simplest form, as a mixed number, as a decimal and as a percentage. It accepts proper fractions like 3/4, mixed numbers like 2 1/2, whole numbers and decimals, so you can mix them freely.
Below the answer you see the working: the common denominator for adding and subtracting, the multiplied tops and bottoms, or the flipped second fraction for division. A second box simplifies any fraction, such as 18/24 to 3/4, and turns decimals like 0.375 into fractions.
How to use the Fraction Calculator tool
- Type the first fraction, for example
1/2or1 3/4. - Choose add, subtract, multiply or divide.
- Type the second fraction.
- Read the simplified answer, mixed number, decimal and percent.
- Follow the step-by-step working to check the method.
Why use ToolOrca Fraction Calculator
- Fractions, mixed numbers, whole numbers and decimals
- Answer always reduced to lowest terms
- Mixed number, decimal and percent results
- Step-by-step working
- Simplify fractions and convert decimals
- Exact arithmetic with no rounding errors
How to add, subtract, multiply and divide fractions
Add or subtract: rewrite both fractions with a common denominator, then add or subtract the tops. 1/2 + 1/3 = 3/6 + 2/6 = 5/6.
Multiply: multiply the tops and multiply the bottoms. 2/3 × 3/4 = 6/12 = 1/2.
Divide: flip the second fraction and multiply. 3/4 ÷ 1/2 = 3/4 × 2/1 = 6/4 = 1 1/2.
To simplify, divide the top and bottom by their greatest common divisor. 18/24: the GCD is 6, so it becomes 3/4.
Frequently asked questions
How do I enter a mixed number?
Type the whole number, a space and then the fraction, for example 2 1/2 for two and a half. Negative mixed numbers work too: -1 3/4.
How do I convert a decimal to a fraction?
Type the decimal in the simplify box. 0.75 becomes 3/4 and 1.125 becomes 9/8 (1 1/8). Repeating decimals such as 0.333… must be typed as a fraction (1/3) to be exact.
What is an improper fraction?
A fraction whose top is larger than its bottom, such as 7/4. The calculator shows it as a mixed number too: 7/4 = 1 3/4.
Why is my answer different from my textbook?
Check that it is fully simplified. 4/8 and 1/2 are the same value, and this calculator always reduces to lowest terms.