Answer: 5.125 cups punch. Explanation: So you need to set up a problem to add the liquids for the punch. Create the equation according to the text. 2 1/4 + (1/2)*2 1/4 + 3/8 + 11/8. Since all of the denominators have the common multiple of 8, change them to all have a denominators of 8. 18/8 + 9/8 + 3/8 + 11/8. Using the rules of addition, add all of the numerators (leaving the denominators the same). You should get 41/8. To turn this into a decimal, divide the numerator by the denominator. The answer is 5.125 cups.