Reduce the Fraction Below to Lowest Terms $\frac { 20 b x } { 128 b }$

Multiple Choice

Reduce the fraction below to lowest terms. $\frac { 20 b x } { 128 b }$

A) $\frac { 5 x } { 32 }$
B) $\frac { 5 x } { 64 }$
C) $\frac { 15 x } { 64 }$
D) $\frac { 5 } { 32 }$
E) none of these