Ken has a toy chest with hot wheels cars. He has 6 camaros, 2 Lamborghinis, 4 corvettes, 8 Ferraris and 12 mustangs. Ken wants to keep his little brother occupied while he does his homework. Ken reaches into the toy chest without looking and gets a car to give to his little brother. What is the probability that Ken will choose a Lamborghini or Corvette from his toy chest? Express your probability answer as a fraction, decimal and percent.