the balance of a trader weighs 10 % less than it should . still the trader marks up his goods to get an overall profit of 40 % . what is the mark up on the cost price ?
"the most natural way to deal with ' weights ' questions is by assuming values . say the trader ' s balance shows 100 gms . it is actually 90 gms because it weighs 10 % less . say , the cost price is $ 90 ( $ 1 / gm ) . since he gets a profit of 40 % , the selling price must be 90 + ( 40 / 100 ) * 90 = $ 126 since the cost price is actually supposed to be $ 100 ( for 100 gms ) and the selling price is $ 126 , the mark up is simply 26 % . ans : e"
subtract(add(multiply(multiply(const_4, 10), divide(40, const_100)), multiply(const_4, 10)), const_100)