The answer that you are looking for 1/5, you basically 2/3 in decimal form is 0.6. Then you divide by 3 to get 0.2. Then the way I did this was by first doing 2 over 10 (2/10), then reduced it to 1/5 (1 over 5).
*This was the way I did it, you don't have to do it this way. Find a way that is easiest for you to answer problems like this in the future.