Can I divide by a zero fraction?
No. Division is undefined when the second fraction has a zero numerator.
Fraction Calculator
Add, subtract, multiply, or divide two fractions and simplify the result.
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Exact fraction operations
Addition and subtraction use a common denominator; multiplication combines numerators and denominators; division multiplies by the reciprocal. The result is normalized and reduced by the greatest common divisor.
a/b ± c/d = (ad ± bc)/bd; (a/b) × (c/d) = ac/bdWorked example
Add one third and one sixth
Inputs: firstFraction: 1/3 · operation: add · secondFraction: 1/6
Illustrative result: 1/2 · decimal 0.5
A common denominator of 6 gives 2/6 + 1/6 = 3/6, which reduces to 1/2.
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Frequently asked questions
Are negative fractions supported?
Yes. The sign is normalized to the numerator in the reduced result.