First, solve the number of pounds of candy owned by Marvin.
Marvin: = 7(3/4) = 21/4 pounds
Then, the number of pounds of candy owned by Walter is,
Walter = (2/3)(21/4) = 7/2 pounds
The number of pounds of candy left with Marvin,
Marvin2 = (21/4) - (7/2) = 7/4 pounds
If we are to subtract the number of pounds of candy owned by Walter from with that owned by Marvin,
7/2 - 7/4 = 7/4
Thus, Walter owned 7/4 pounds more candy than Marvin. The answer to this item is letter D.