A man can make 12 birdhouses in 8 hours. How many hours will it take him to make 30 (show you work)

It will take him 20 hrs.

Step-by-step explanation:

I don't exactly do this the traditional way but here goes:

Divide 12/8 to get the birdhouse/hrs ratio (which is 1.5) and divide 30 by 1.5 in order to get the amount of hours it will take him to make 30 birdhouses.

20 hours

Step-by-step explanation:

amount of birdhouse he can make in 1 hour

12/8 = 1.5 bird house / hour

the amount of time it take to make 30 birdhouse

30 / 1.5 = 20 hours