Fraction Calculator

Add, subtract, multiply, divide. Result is auto-reduced and shown in both improper and mixed-number form.

Result

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Mixed number

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Decimal

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How fractions are entered

Type fractions as "numerator/denominator" — e.g. 3/4, -7/2, 15/45. Whole numbers work too (just 5).

How the math works

  • + / − — find common denominator, then add/subtract numerators.
  • × — multiply numerators, multiply denominators.
  • ÷ — flip the second fraction, then multiply.

Every result is auto-reduced by dividing both parts by their GCD.