It will take 4 people a total of 63 hours to build a deck. how many people are needed to build the same type of deck in 36 hours?

Well,

63 divided by 4 equals 15.75

So, each person holds 15.75 hours.

15.75 * 2 people = 31.5 hours, so that would not work.

15.75 * 3 people = 47.25, which is the closest you're going to get.

Correct 3 people

All you have to do is multiply