Describe the pattern below
3 6.5 11 16.5 23

6.5 - 3 = 3.5
11 - 6.5 = 4.5
16.5 - 11 = 5.5
23 - 16.5 = 6.5

From this, you can see that the number being added is increasing by 1 each time.

Therefore, the pattern is adding 3.5, then 4.5, then 5.5, then 6.5, and so on.

Your answer should be 1/3. i hope i could ! good luck : )