Find $\frac { 16 } { 23 }$ Decreased By $\frac { 12 } { 23 }$

Find $\frac { 16 } { 23 }$ decreased by $\frac { 12 } { 23 }$ .

A) $\frac { 2 } { 23 }$
B) $\frac { 4 } { 69 }$
C) $\frac { 4 } { 23 }$
D) $\frac { 1 } { 23 }$
E) $\frac { 4 } { 115 }$