Answer:
25.5
Step-by-step explanation:
30% of 80 is 25.5
think of it as two fractions, and use the butterfly method
30/100 ?/80
from there solve
432.2 / 4 = 108.1 <== avg of what 1 tank holds
1/2 full = 108.1/2 = 54.05
Sorry I have to go to baseball bye