Math
Add, subtract, multiply, or divide two fractions — simplified automatically.
Simplified result
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Adding 3/4 and 5/6 requires a common denominator: 3/4 becomes 9/12 and 5/6 becomes 10/12, giving 19/12 — which the calculator automatically presents as the simplified improper fraction alongside its decimal equivalent, 1.5833. Manually, finding that common denominator and simplifying the result is where most arithmetic mistakes happen.
An unsimplified fraction like 24/36 is mathematically correct but obscures the actual relationship the numbers represent — its simplified form, 2/3, is what most contexts (recipes, ratios, exam answers) actually expect. Automatically reducing to lowest terms avoids submitting a technically-right-but-poorly-formed answer.
Convert both fractions to a common denominator first — multiplying each fraction's numerator and denominator by the other's denominator works for any pair — then add the numerators. This calculator does that automatically and simplifies the result.
Multiply by the reciprocal — flip the second fraction upside down, then multiply straight across. For example, 1/2 ÷ 1/3 becomes 1/2 × 3/1 = 3/2.
The calculator divides both the numerator and denominator by their greatest common divisor, so you always get the simplest equivalent fraction rather than something like 4/8 when 1/2 would do.