Explanation:
Total cups of fruit punch = 80
52 cups of fruit juice
Fraction of fruit juice to total =
What percent of punch is fruit juice:
Fruit Juice = 65%
What percent of punch is sparkling water:
There are 80 cups in total and 52 cups is fruit juice and the rest of the cups are sparkling water.
Find the number of cups of sparkling water by subtracting 52 from 80 and then divide that number by the total number of cups, which is 80 cups
80 - 52 = 28 cups of sparkling water
Sparkling Water = 35%