one fourth of a solution that was 15 % salt by weight was replaced by a second solution resulting in a solution that was 16 percent sugar by weight . the second solution was what percent salt by weight ?
"consider total solution to be 100 liters and in this case you ' ll have : 75 * 0.15 + 25 * x = 100 * 0.16 - - > x = 0.19 . answer : d ."
multiply(subtract(multiply(divide(16, const_100), const_4), subtract(multiply(divide(15, const_100), const_4), divide(15, const_100))), const_100)