Explanation:
On a hiking trip, Amy drank 4 1/2 cups of water in the morning and 7¼ cups of water in the afternoon. How much water did Amy drink in all?
morning: 4 1/2 cups or 4.5 cups
evening: 7 1/4 cups or 7.25 cups
4.5 + 7.25 = 11.75 cups or 11 3/4 cups total