Question

if a plumber can check 960 fittings in 15 work days, how many can he check in 1/4 of the working day at the same rate ?

Answer 1

let x = # of fittings checked per day

960 = 15x

Solve for x:

1. Divide by 15
64 = x

This tells us the plumber can check 64 fittings per day. This is not the answer quite yet. Since he only works 1/4 a day, multiply this 64 by 1/4:

64 * 1/4 = 16

The answer is 16 fittings.