A side of beef lost 20 percent of its weight in processing. If the side of beef weighed 640 pounds after processing, how many pounds did it weigh before processing?	Pick one:	A) 191	B) 355	C) 800	D) 840	E) 900
Let weight of side of beef before processing = x   (80/100)*x = 640   =&gt; x = (640 * 100)/80= 
<gadget id="calculator">(640 * 100)/80</gadget>
<output>800</output>
800   Answer 800
<result>C</result>
A side of beef lost 20 percent of its weight in processing. If the side of beef weighed 640 pounds after processing, how many pounds did it weigh before processing?