Fraction Calculator
Add, subtract, multiply or divide two fractions with simplified results.
Adding, subtracting, multiplying, or dividing fractions each follow different rules — and getting a common denominator by hand is where most manual errors happen.
Why multiplication and division skip the common denominator step
Addition and subtraction require a shared denominator before combining numerators. Multiplication just multiplies straight across, and division flips the second fraction and multiplies — neither needs a common denominator.
Frequently asked questions
Why is my answer already simplified?
This calculator automatically reduces the result to lowest terms by dividing both numerator and denominator by their greatest common factor.
Can I use negative numbers?
Yes — enter a negative sign on either the numerator or denominator.