Let us make the denominators all the same so we can compare the fractions easily. We have 1/8, 1/4, 1/2, 5/8, and 7/8. It will be easiest if we change the denominators to 8. Three of the fractions already have a denominator of 8, so we only have to change two. 1/2 equals 2/4 equals 4/8. 1/4 equals 2/8.
Now we can compare the fractions easily. We have 1/8, 2/8, 4/8, 5/8, and 7/8. We see that 7/8 is the greatest fraction.
I hope that this helped you!