What is the common ratio between successive terms in the sequence?

The common difference between successive terms in the sequence is:
6
We know that for any arithmetic sequence of the type:
[tex]a,\ a+d,\ a+2d,\ a+3d,\ ......[/tex]
with the common difference d such that the common difference is given by:
[tex]d=a_n-a_{n-1}[/tex]
Here the arithmetic sequence is given by:
2 , 8 , 14 , 20 , 26
Hence, the common difference is given by:
[tex]d=8-2\\\\d=6[/tex]