Work out subtracting fractions instantly with clear inputs, formula shown and shareable results.
Subtraction mirrors addition: put both fractions over the common denominator bd and subtract the numerators, giving (ad − cb)/bd, then reduce.
Subtracting fractions
a/b − c/d = (ad − cb) / bd
(18 − 4)/24 = 14/24 = 7/12.
That is fine; the sign is carried on the numerator and the reported fraction keeps a positive denominator.