A pharmaceutical company received $2 million in royalties on the first $12; million in sales of generic equivalent of one of its products and then $4 million in royalties on the next $48 million in sales. By approximately what percent did the ratio of royalties to sales decrease from the first $12 million in sales to the next $48 million in sales?	Select.
A) 20%
B) 25%
C) 30%
D) 50%
E) 55%
change in ratio of royalties to sales = 2/12 -4/48 = 1/12   % decrease = (1/12)/(2/12) *100= 
<gadget id="calculator">(1/12)/(2/12) *100</gadget>
<output>50</output>
50% (approx)   Answer: 50%)
<result>D</result>
A pharmaceutical company received $2 million in royalties on the first $12; million in sales of generic equivalent of one of its products and then $4 million in royalties on the next $48 million in sales. By approximately what percent did the ratio of royalties to sales decrease from the first $12 million in sales to the next $48 million in sales?