Find the Common Ratio of the Geometric Sequence with a First

Multiple Choice

Find the common ratio of the geometric sequence with a first term of 18 and a $7 ^ { \text {th } }$ term of $\frac { 2 } { 81 }$ .

A) $\frac { 1 } { 3 }$
B) $\frac { 1 } { 81 }$
C) $\frac { 1 } { 9 }$
D) $\frac { 1 } { 27 }$