Answer
% of carcass in live hog = $78$ %
waste % = $(100-78)$ = $22$ %
Work Step by Step
We are given:
Weight of live hog = $254lb$
weight of carcass = $198lb$
% of carcass in live hog = $\frac{carcass~weight}{live~hog~weight}$
% of carcass in live hog = $\frac{198}{254}$
% of carcass in live hog = $78$ %
waste % = $(100-78)$ = $22$ %
