Free Online Fraction Calculator
Add, subtract, multiply, and divide fractions
Result
13/12
Mixed number: 1 1/12
Decimal: 1.083333
Step-by-step
- Find LCD of 4 and 3: LCD = 12
- Convert: 3/4 = 9/12 and 1/3 = 4/12
- Add: 9 + 4 = 13, so result = 13/12
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About this tool
Add, subtract, multiply, and divide fractions with this free fraction calculator. Enter two fractions, pick an operation, and get the result as a simplified fraction, mixed number, and decimal — plus a step-by-step solution showing exactly how the answer was found. The calculator automatically simplifies results using the greatest common divisor (GCD) and handles improper fractions, negative numbers, and mixed-number conversion. Whether you are checking homework, solving recipe conversions, or working through a math problem, this tool shows the work so you can learn the process — not just get the answer. No sign-up, runs entirely in your browser.
How to use Fraction Calculator
- Enter fractions. Type the numerator and denominator for each fraction.
- Choose operation. Select add, subtract, multiply, or divide.
- View result. See the simplified fraction, mixed number, decimal, and step-by-step solution.
Frequently Asked Questions
Find the least common denominator (LCD), convert both fractions to have the LCD, add the numerators, and simplify. For example: 1/3 + 1/4 → 4/12 + 3/12 = 7/12.
Multiply the numerators together and the denominators together, then simplify. For example: 2/3 × 3/4 = 6/12 = 1/2. You can cross-cancel before multiplying to simplify early.
Multiply the first fraction by the reciprocal (flip) of the second. For example: 2/3 ÷ 4/5 = 2/3 × 5/4 = 10/12 = 5/6.
An improper fraction has a numerator larger than or equal to its denominator, like 7/4. It can be converted to a mixed number: 7/4 = 1¾ (1 whole and 3/4).
Divide both the numerator and denominator by their greatest common divisor (GCD). For example: 8/12 → GCD is 4 → 8÷4 / 12÷4 = 2/3.
Divide the numerator by the denominator. For example: 3/8 = 3 ÷ 8 = 0.375. Some fractions produce repeating decimals, like 1/3 = 0.333...
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