a merchant marks goods up by 75 % and then offers a discount on the marked price . the profit that the merchant makes after offering the discount is 5 % . what % discount did the merchant offer ?
"let p be the original price of the goods and let x be the rate after the markup . ( 1.75 p ) * x = 1.05 p x = 1.05 / 1.75 = 0.6 which is a discount of 40 % . the answer is d ."
multiply(divide(subtract(subtract(add(const_1, divide(75, const_100)), const_1), divide(5, const_100)), add(const_1, divide(75, const_100))), const_100)