Two employees are filling crates. One fills

2

3

of a crate each hour, one fills

1

1

4

crates every 2 hours.

How many crates will they fill in 4 hours?

2 4/7 crates

3 5/6 crates

5 1/6 crates

7 2/3 crates

Calculate both of those per hour:

2/3 crate / hour

1.25 crates / 2 hours = 5/8 crates / hour

2/3 + 5/8 = 16/24 + 15/24 = 31/24 per hour =

124 / 24 crates in 4 hours = 5 (4/24) crates =

5 (1/6) crates per 4 hours