Question 1081285
Let n be the amount of Sweet Tropical Fruit Punch. Then the amount of pure grape juice would be 25-n. So:
.25n+25-n=25(.5)
.75n=12.5
n=16.6666667
You need 16-2/3 gal. of Sweet Tropical punch, and 8-1/3 gal pure grape juice for your mix. ☺☺☺☺