How many fixtures could sandy install in 29 hours?

Question

Sandy can assemble a particular type of light fixture in 3/8 hour it takes her 2/3 hour to hang the fixture and another 1/6 hour to wire the fixture once it's hung. How many fixtures could sandy install in 29 hours?

 

if some one could show me how to do this problem that'd be great don't gotta give the answer I need to know how the hell do this 

Answer 1

What we need to do is look at how long it takes to install one fixture:

3/8 + 2/3 + 1/6

What we need is to get a common denominator. The LCD in this case is 24:

8 * 3 = 24

3 * 8 = 24

6 * 4 = 24

 

So that gives us:

9/24 + 16/24 + 4/24

 

Add those together to see how many hours it takes to install a fixture, and then divide 29 by that number to get the total number of fixtures.