a pharmaceutical company received $ 3 million in royalties on the first $ 30 million in sales of and then $ 9 million in royalties on the next $ 120 million in sales . by approximately what percentage did the ratio of royalties to sales decrease from the first $ 30 million in sales to the next $ 120 million in sales ?
"( 9 / 120 ) / ( 3 / 30 ) = 3 / 4 = 75 % it means that 9 / 120 represents only 75 % . therefore a decrease of 25 % . answer c"
multiply(divide(3, 30), const_100)