Question

Chang made $144 for 9 hours of work.

At the same rate, how many hours would he have to work to make $112?

Answer 1

144 dollars=9 hours of work

112 dollars= x hours of work

144/112=9/x

144x=112(9)

Cross Multiply

x=7

He'll have to work 7 hours.

Answer 2

Chang has to work 9 hours to make $112

Explanation:

Amount made in an hour = Total amount/total hours worked

`=(144)/(9)\\`

= $16

Duration he has work to make $112 = 112/16

= 9 hours