shopkeeper rise price by 31 % and gives successive discount of 10 % and 15 % . what is overall % gain or loss ?
"let d initial price be 100 31 % rise now price = 131 / 100 * 100 = 131 10 % discount then price = 131 * 90 / 100 = 117.9 15 % discount then price = 117.9 * 85 / 100 = 100.215 so gain = 100.215 - 100 = 0.215 gain % = gain * 100 / cp = = > 0.215 * 100 / 100 = 0.215 % answer : a"
subtract(multiply(multiply(add(const_100, 31), divide(subtract(const_100, 10), const_100)), divide(subtract(const_100, 15), const_100)), const_100)