Answer:
32%
Step-by-step explanation:
2 L of brand A of fruit punch contains 40% * 2 L = 0.8 L juice
8 L of brand B of fruit punch contains 30% * 8 L = 2.4 L juice
Total juice = 0.8 L + 2.4 L = 3.2 L
Total mixed fruit punch = 2 L + 8 L = 10 L
percent juice = (3.2 L)/(10 L) * 100 = 32%