Keep the answer
in fraction form.
Add, subtract, multiply, divide, or compare fractions without losing the exact result. Reduce the answer automatically and show the working in this browser tab.
Fraction calculator
Build two fractions.
Local calculation · reduced to lowest terms
How the result was built.
1/2 + 3/4 = 2/4 + 3/4 = 5/4
Leave the whole-number box empty for a simple fraction. A negative whole number keeps the sign on the complete mixed number. Denominators cannot be zero.
Does the calculator reduce every answer?
Yes. The exact result is normalized so the denominator is positive and common factors are removed. The mixed, decimal, and percentage views are derived from that exact fraction.
Can I enter mixed numbers?
Yes. Enter the whole number in the small Whole box and the fractional part in Numerator and Denominator. Leave Whole empty for a simple fraction.
What happens if I divide by zero?
The page stops with a clear error instead of showing an invalid number. All fraction values are processed locally in this browser tab.