You enter two fractions and pick an operation. For addition and subtraction, the tool cross-multiplies to find a common denominator: (a/b) ± (c/d) = (ad ± bc) / bd. For multiplication it multiplies straight across, and for division it flips the second fraction and multiplies. The result is then reduced using the greatest common divisor.
Division by zero is undefined in mathematics, so the calculator will show an error. Make sure both denominators are non-zero integers.
Yes. Enter a negative numerator (e.g., -3/4) and the calculator will handle the sign correctly through all operations and simplification.
The tool finds the greatest common divisor (GCD) of the numerator and denominator using the Euclidean algorithm, then divides both by it. For example, GCD(12, 8) = 4, so 12/8 simplifies to 3/2.
Yes — enter the whole number as the numerator and 1 as the denominator. For example, to add 3 + 1/2, enter 3/1 + 1/2.
Estimate only. Results reflect your inputs and standard formulas. Double-check important decisions independently.