I’m totally confused and didn’t understand Greg’s explanation for it
Hint:-
If you divide the Qty A and Qty B by 3 , you’ll get 5A and 3B respectively.
Given:
multiply the 5(3.0A) and 3 in 3(5.0B)
15.05A > 15.03B —> Eq1
Now , 15.0 is the same in both cases so we only compare
5A to 3B