you will add 16 and 24 you will get 40 but your answer choices are 20,30,33 1/3, and 50% so what you will do is take the two numbers closet to 40 which are
33 1/3% and 50 % my teacher always told me if the number is 0 you round down if it is 5 you round up so your best bet would be 33 1/3.
BEST ANSWER:33, 1/3