Question

Kevin made $147 for 7 hours of work. At the same rate, how many hours would he have to work to make $189?

Answer 1

9 hours

Explanation:

Let x be the hours.

Money $147 $189

Hours 7 x

It is a direct proportion since when money increases the hours increase too because to earn more money you have to work more hours. Direct proportionality means that something increases because something else increases. So divide upwards from hour to money or vice versa.

147/7 = 189/x

21= 189/x

21x= 189 (cross multiply)

x= 189/21 (multiplication changes to division)

x= 9 hours

Answer 2

9 hours

Explanation:

Given - Kevin made $147 for 7 hours

So per hour he makes $147 / 7 = $21

Therefore if he wants to make $189 then he has to work for = $189 / 21 = 9 hours