the balance of a trader weighs 8 % less than it should . still the trader marks up his goods to get an overall profit of 20 % . 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 92 gms because it weighs 8 % less . say , the cost price is $ 92 ( $ 1 / gm ) . since he gets a profit of 20 % , the selling price must be 92 + ( 20 / 100 ) * 92 = $ 110.4 since the cost price is actually supposed to be $ 100 ( for 100 gms ) and the selling price is $ 110.4 , the mark up is simply 10.4 % . ans : c"
subtract(add(multiply(multiply(const_4, 8), divide(20, const_100)), multiply(const_4, 8)), const_100)