2 1/2 gal or 2.5 gal
21 qt - 11 qt = 10 qt 10 qt/4 qt = 2 gal 2 qt First convert the amounts into quarts. There are 4 quarts in every gallon. So, for the first amount: (5 x 4) + 1 = 21 qt. For the second amount: (2 x 4)...
5 gal = 4 gal 4 qt 4 gal 4 qt 3 gal 3 qt ------------- 1 gal 1 qt
24 / 4 = 6 containers
1 gallon = 4 quarts so 1 quart = 0.25 gallons