Fraction Calculator
Add, subtract, multiply, or divide two fractions and see the simplified fraction and decimal result.
Your result
Review your calculated values below.
Ready when you are.
Choose Calculate to see your result.
How to use this calculator
- Enter your values in the labeled fields, keeping the displayed units.
- Choose Calculate or press Enter in a single-line field.
- Review the result and the assumptions below before using it.
Formula and method
Addition uses (a × d + c × b) / (b × d). The numerator and denominator are reduced by their greatest common divisor.
Worked example
1/2 + 1/3 = 5/6, approximately 0.833333.
What the result assumes
Enter whole-number components. Denominators cannot be zero, and division by a zero fraction is undefined.
Common question
Can I enter negative fractions?
Yes. A negative numerator or denominator represents a negative fraction; the result keeps its sign in the numerator.