Find an Equivalent Expression with the Given Denominator $$\frac { 4 } { 5 } = \frac { ? } { 15 x }$$

Multiple Choice

Find an equivalent expression with the given denominator.
- $$\frac { 4 } { 5 } = \frac { ? } { 15 x }$$

A) $\frac { 4 x } { 15 x }$
B) $\frac { 9 x } { 15 x }$
C) $\frac { 12 x } { 15 x }$
D) $\frac { 12 } { 15 x }$