alfred buys an old scooter for $ 4700 and spends $ 800 on its repairs . if he sells the scooter for $ 6000 , his gain percent is ?
"c . p . = 4700 + 800 = $ 5500 s . p . = $ 6000 gain = 6000 - 5500 = $ 500 gain % = 500 / 5500 * 100 = 9.1 % answer is a"
multiply(divide(subtract(6000, add(4700, 800)), add(4700, 800)), const_100)