Question

The numerator of a fraction is 3 less than its denominator . If 1 is added to the denominator . The fraction is decreased by 1/15. find the fraction

Answer 1

the original fraction is (n-3)/n

so now we know that
(n-3)/(n+1) = (n-3)/n - 1/15
So now just solve for n and use that to answer the question.