I will not straight-up answer your question, for that, child, is cheating. I can give you the steps, though.
You should make 1 1/8 into a mixed number, which you should know how to already. Since 1 1/8 and 5/8 have a common denominator, you will have an easy time subtracting them.
?/8 - 5/8.
If needed, change answer back into a mixed number. If needed, then simplify.