The first answer, using a number line, is a good answer.
I have two other ways:
Way #1:
5 stones is more than 3 stones. 5 gallons is greater than 3 gallons. 5 pounds is greater than 3 pounds. 5 puppies is greater than 3 puppies. 5 hamburgers is greater than 2 hamburgers. 5 schoolbuses is greater than 3 schoolbuses.
We look around us, and we see that 5 of anything is always greater than 3 of the same thing.
There's no reason that should change if the 'things' are eighths.
Way #2:
-- Get 2 friends to help you.
-- Take one good-size veggie pizza or coconut cream pie.
-- Carefully cut it up in eight (8) equal pieces. Now each piece is 1/8 of the pie or the pizza.
-- Give 5 pieces (5/8) to the first friend. Give 3 pieces (3/8) to the other friend.
-- Ask them to get together and agree on who has more.
