400
A chip is chosen from a bag that contains 7 red, 15 purple, and 3 blue chips. The chosen chip is then returned to the bag and a 2nd chip is chosen. The 2nd chip is returned to the bag and then a 3rd chip is chosen. What is the probability of choosing a red, then another red, and then a purple, in that order? Express your answer as a percent, rounded to the nearest tenth.
4.7%