Billy should choose the higher percentage from the two choices. In mathematics operation, the word “of” means multiplication, therefore:
Choice 1: 2/5 of ½ Total = (2/5)(1/2) = 2/10 = 0.2
20% of stand’s profit
Choice 2: 1/3 of ¾ Total = (1/3)(3/4) = 3/12 = 0.25
25% of stand’s profit
Therefore Billy should choose choice#2: 1/3 of ¾.
The increase is 5%.