Apunch recipe says to mix 4 cups pineapple juice, 8 cups orange juice, and 12 cups seltzer in order to make 18 servings of punch.
a. how many cups of each ingredient do you need to make 108 cups of punch?
b. how many servings can be made from 108 cups of punch?
c. for every cup of seltzer you use, how much orange juice do you use?

A. 4 cups pineapple juice+8 cups orange juice+12 cups seltzer=24 cups total
108/24=4.5, so you need 4.5*(recipe)=
18 cups pineapple juice, 36 cups orange juice, and 54 cups seltzer
B. each recipe makes 18 servings, so 4.5*(recipe) =4.5*18= 81 servings
C. 8 cups orange juice/12 cups seltzer=2 cups orange juice/3 cups seltzer=2/3 cups orange juice/1 cup seltzer

The variables should add up to equal 1

It is 6% because if you subtract 69-58=6 so 6% is the answer to your question.