Add, subtract, multiply or divide fractions instantly. This free fraction calculator simplifies every answer to lowest terms and shows it as a mixed number, decimal and percentage.
Two fractions
Enter a numerator and denominator for each fraction, pick an operation, and see the simplified result, mixed number and decimal.
Result (simplified)
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Enter both fractions
Mixed number
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Decimal
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As entered
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Percentage
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Adds, subtracts, multiplies and divides fractions, then reduces to lowest terms using the greatest common divisor. Handles negative numbers and improper fractions.
Use this free fraction calculator to add, subtract, multiply and divide fractions. Enter two fractions, pick an operation, and get the answer in lowest terms — plus a mixed number and decimal.
What this fraction calculator does
A fraction calculator does the arithmetic on two fractions for you and simplifies the result. It handles addition, subtraction, multiplication and division, reduces to lowest terms, and also shows the answer as a mixed number, decimal and percentage.
How to calculate with fractions
Operation
Rule
Add / subtract
Make denominators equal, then add or subtract the numerators.
Multiply
Multiply numerators together and denominators together.
Divide
Flip the second fraction and multiply.
Simplify
Divide top and bottom by their greatest common divisor.
For example, 1/2 + 1/3 = 5/6, and 3/4 ÷ 1/2 = 3/2 = 1½.
Worked example: 1/2 + 1/3
The common denominator of 2 and 3 is 6. Convert: 1/2 = 3/6 and 1/3 = 2/6. Add the numerators: 3/6 + 2/6 = 5/6. Since 5 and 6 share no common factor, 5/6 is already in lowest terms.
How to use the fraction calculator
Enter the first fraction’s numerator and denominator.
Pick an operation (+, −, ×, ÷).
Enter the second fraction.
Read the simplified result, mixed number and decimal.
Fraction Calculator FAQ
How do I add fractions?
Give both fractions the same denominator, add the numerators, then simplify. For example, 1/2 + 1/3 becomes 3/6 + 2/6 = 5/6. The calculator does this automatically.
How do I divide fractions?
Flip the second fraction and multiply. So 3/4 ÷ 1/2 becomes 3/4 × 2/1 = 6/4, which simplifies to 3/2 or 1½.
How does it simplify fractions?
It divides the numerator and denominator by their greatest common divisor (GCD), giving the answer in lowest terms.
Can it handle mixed and improper fractions?
Yes. Enter improper fractions like 7/2 and the calculator shows both the fraction and its mixed-number form (3½). It also handles negatives.
Does it show the decimal value?
Yes, every result includes the decimal and percentage equivalents alongside the simplified fraction and mixed number.
Is the fraction calculator free?
Yes, this fraction calculator is completely free, needs no sign-up, and gives instant results in your browser.
