Before we can make this comparison, we have to change 3 3/8 lb into oz:
3 3/8 lb = 27/8 lb
Multiplying this by the conversion factor derived from 1 lb = 16 oz, we get
27 lb 16 oz
--------- * ---------- = 54 oz.
8 1 lb
Thus, after this comparison we can write: 3 3/8 lb = 54 oz.