To make 100 quarts of sparkling grape juice 66.67 quarts of sparkling water and 33.33 quarts of grape fruits are needed.
Explanation:
A recipe for sparkling grape juice calls for 1 1/2 quarts of sparkling water 3/4 quarts of grape fruits.
Sparkling water required = 1 1/2 quarts = 1.5 quarts
Grape fruits required = 3/4 quarts = 0.75 quarts
Total quarts of recipe = 1.5 + 0.75 = 2.25 quarts
Total juice required = 100 quarts.

Sparkling water required to make 100 quarts juice = 44.44 x 1.5 = 66.67 quarts
Grape fruits required to make 100 quarts juice = 44.44 x 0.75 = 33.33 quarts
To make 100 quarts of sparkling grape juice 66.67 quarts of sparkling water and 33.33 quarts of grape fruits are needed.