in 1982 and 1983 , company b ’ s operating expenses were $ 10.0 million and $ 12.0 million , respectively , and its revenues were $ 15.6 million and $ 18.8 million , respectively . what was the percent increase in company b ’ s profit ( revenues minus operating expenses ) from 1982 to 1983 ?
"profit in 1982 = 15.6 - 10 = 5.6 million $ profit in 1983 = 18.8 - 12 = 6.8 million $ percentage increase in profit = ( 6.8 - 5.6 ) / 5.6 * 100 % = 21 3 / 7 % answer d"
subtract(const_100, divide(multiply(subtract(12.0, 10.0), const_100), subtract(18.8, 15.6)))