5 gal 3 qt + 5 gal 3 qt + 5 gal 3 qt =
17
gal
1
qt
Convert your answer to the largest units possible.
Decompose 9 quarts into gallons and quarts.

1 gal = 4 qt

5 gal 3 qt + 5 gal 3 qt + 5 gal 3 qt = 15 gal
9 qt
2 gal
6
qt