Fraction Calculator
Add, subtract, multiply or divide two fractions. Results are automatically simplified with the decimal equivalent shown.
Calculate with fractions
Enter each fraction as a numerator and denominator.
Result
Simplified fraction
0
Decimal value
0
Formulas used
- Add
- a/b + c/d = (a×d + c×b) / (b×d)
- Subtract
- a/b − c/d = (a×d − c×b) / (b×d)
- Multiply
- a/b × c/d = (a×c) / (b×d)
- Divide
- a/b ÷ c/d = (a×d) / (b×c)
Example: 1/2 + 1/3 = 5/6 (0.8333)
How to use this calculator
- Enter the numerator and denominator for the first fraction.
- Choose an operation.
- Enter the numerator and denominator for the second fraction, then press Calculate.
FAQ
Frequently asked questions
How do you add two fractions?
Convert both fractions to a common denominator, add the numerators, then simplify. This calculator does that automatically.
How do you divide fractions?
Multiply the first fraction by the reciprocal of the second: (a/b) ÷ (c/d) = (a×d) / (b×c).
Does this calculator simplify the answer?
Yes. Every result is automatically reduced to its simplest form using the greatest common divisor.
Can the denominator be zero?
No. A fraction with a zero denominator is undefined, so the calculator will show an error if you try that.