Fraction Calculator
Convert, simplify, and calculate with fractions.
Fraction → decimal & simplified form
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Decimal
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Simplified
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Decimal → fraction
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Fraction arithmetic
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How it's calculated
- Fraction → decimal
- Decimal = Numerator ÷ Denominator
- Decimal → fraction
- Write over a power of 10, then divide top and bottom by their greatest common divisor
- Add
- a/b + c/d = (a·d + c·b) ÷ (b·d)
- Multiply / divide
- a/b × c/d = (a·c) ÷ (b·d) · a/b ÷ c/d = (a·d) ÷ (b·c)
Results are always reduced to lowest terms by dividing the top and bottom by their greatest common divisor.
Frequently asked questions
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