It is 6 units because if you divide 9 by 3 you get 3 and you multiple that by 2 to make it 6:9 which is equal to 2:3
Answer:
16
Step-by-step explanation:

The choice isB
all the numbers in that choice decrease in numerical order
The answer is A divided 200 by 4 and get 50
D. 100/135 the rest of them equal 135%