Computes (a/b) + (c/d)
Integers only; negative numerators allowed; denominators non-zero.
Computes (a/b) + (c/d)
Uses integers only: a/b + c/d = (a·d + c·b) / (b·d), then divides numerator and denominator by their GCD (signs normalized so the denominator is positive when possible). Denominators must be non-zero.
This calculator uses plain decimal numbers. If a result looks wrong, check whether you used a comma instead of a dot (or vice versa) where the field expects one.