Fraction calculator
Perform one operation on two fractions.
Formula
a/b ± c/d = (ad ± bc)/bd; multiply ac/bd; divide ad/bc.
First numerator = 1 · First denominator = 2 · Second numerator = 1 · Second denominator = 3 · Operation = Add
How to use
- Enter each numerator and denominator.
- Choose the operation.
- Read the reduced fraction and decimal.
Examples
- 1/2 + 1/3 = 5/6.
- 2/3 ÷ 4/5 = 5/6.
Frequently asked questions
Can I use negative fractions?
Yes. Put a minus sign on the numerator or denominator.
Why is a zero denominator rejected?
Division by zero is undefined. The divisor fraction must also be nonzero.
How large can the numbers be?
Each part must be an integer from −1000000 to 1000000.
How do I calculate a complex fraction?
Reduce each numerator and denominator first, then divide the resulting fractions. Nested operations need several passes; convert mixed numbers to improper fractions first.
Sources
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