Fraction Calculator
Add, subtract, multiply, or divide fractions and simplify the result.
How it works
Addition and subtraction put both fractions over a common denominator, multiplication multiplies across, and division multiplies by the reciprocal. The result is then reduced by dividing the numerator and denominator by their greatest common divisor, and shown as a mixed number, a decimal, and a percentage.
Frequently asked questions
How do you simplify a fraction?
Divide the numerator and the denominator by their greatest common divisor. For example 8/12 has a GCD of 4, so it reduces to 2/3 — that is exactly what this calculator does to every result.
What is a mixed number?
A whole number plus a proper fraction, like 1 2/3 instead of 5/3. The calculator shows the mixed form whenever the result is larger than one whole.
Can I use negative fractions?
Yes. Enter a negative numerator or denominator and the calculator normalises the sign onto the numerator before simplifying.
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