Hello,
Here is your answer:
The proper answer to this question is "4".
Here is how:
First convert the mix number into a fraction:
1 1/8=9/8
5*8=40
1*8=8
-
9*1=9
8*1=8
40-8=32
32/8=4
8/8=1
Which means your answer is 4/1 or 4!
If you need anymore help feel free to ask me!
Hope this helps!