Fraction Addition and Subtraction Calculator
Enter two fractions and choose add or subtract to get the result as both a fraction and a decimal.
Fraction Addition and Subtraction Calculator
Add or subtract two fractions and see the result as an unreduced fraction and a decimal.
This calculator provides an estimate for general informational purposes only. It is not a substitute for professional financial, mechanical or engineering advice.
Adding or subtracting fractions requires a common denominator. This calculator cross-multiplies your two fractions to find the combined numerator and denominator directly, and also shows the decimal equivalent.
Example
- With the default values shown above, this calculator returns: Result Numerator ≈ 5; Result Denominator ≈ 6; Result (Decimal) ≈ 0.8333.
Frequently Asked Questions
Does this simplify the resulting fraction?
No — the numerator and denominator shown are the direct result of cross-multiplying, not reduced to lowest terms. Divide both by their greatest common factor to simplify by hand.
Can I use negative numbers?
Yes, enter a negative numerator or denominator directly for negative fractions.