Lius has 5 over 8 quart of grape juice he pours the same amount in each 5 glasses which equation represents the fraction of a quart of grape juice n that is in each glass

So we have to divide 5/8 into 5 equal segments.

5        5
--  ÷  ---
8       1

in order to divide fractions we need to flip the second fraction and change the sign from a divition sign to a multiplication sign

5      1       5
-- × --- =   ---
8      5      40

now we just simplify  5/40 is equal to 1/8

each glass gets 1/8 of a quart