a shopkeeper buys mangoes at the rate of 4 a rupee and sells them at 1 a rupee . find his net profit or loss percent ?
"the total number of mangoes bought by the shopkeeper be 12 . if he buys 4 a rupee , his cp = 1 he selling at 3 a rupee , his sp = 4 profit = sp - cp = 4 - 1 = 3 profit percent = 3 / 1 * 100 = 300 % answer : e"
divide(multiply(const_3.0, const_100), 4)