Enter numerators and denominators for each operation. All answers are simplified automatically.
Add
Result · decimal —
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Subtract
Result · decimal —
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Multiply
Result · decimal —
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Divide
Result · decimal —
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Simplify
Lowest terms · decimal —
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Practical tips & common mistakes
Simplify last
Always reduce fractions at the end — intermediate steps can use common denominators without forcing lowest terms until the final answer.
Adding denominators
½ + ½ is 1, not 2/4 + 2/4 wrongly simplified. You need a common denominator before adding numerators.
Recipe scaling
Halving ¾ cup: multiply numerator and denominator operations carefully, or convert to decimals and back for sanity checks.
Construction math
Carpenters live in sixteenths and thirty-seconds. Verify critical cuts with a second method before you saw.