one fourth of a solution that was 15 % sugar 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 sugar by weight ?
"instead of using complex calculations and remembering formulae , why dont u directly get to weighted average . 3 parts of 15 % + 1 part of x ( unknown ) % = 4 parts of 16 % = > x % = 64 % - 45 % = 16 % ans d it is ."
multiply(divide(subtract(multiply(const_100, divide(16, const_100)), multiply(subtract(const_100, multiply(divide(const_1, const_4), const_100)), divide(15, const_100))), multiply(divide(const_1, const_4), const_100)), const_100)