Answer:
Ari's bag is 1.9 pounds heavier than Juan's bag
Explanation:
Juan’s bag of apples weigh 31/7 pounds.

Ari’s bag of oranges weigh 19/3 pounds.


Hence, Ari's bag is 40/21 pounds heavier than Juan's bag
i.e. Ari's bag is 1.9 pounds heavier than Juan's bag