A side of beef lost 30 percent of its weight in processing. If the side of beef weighed 500 pounds after processing, how many pounds did it weigh before processing? Select.
A) 714.28
B) 712
C) 714.88
D) 714.25
E) 714

Rationale: "let weight of side of beef before processing = x ( 70 / 100 ) * x = 500 = > x = ( 500 * 100 ) / 70 = 714.28 answer a"
Answer: A