Calculate the Dilution Ratio of a Solution of 9 Milliliters $\frac { 1 } { 100 }$

Multiple Choice

Calculate the dilution ratio of a solution of 9 milliliters of urine diluted with 891 milliliters of distilled water. Write the ratio in simplest form using a fraction.

A) $\frac { 1 } { 100 }$
B) $\frac { 1 } { 50 }$
C) $\frac { 3 } { 100 }$
D) $\frac { 1 } { 25 }$
E) $\frac { 1 } { 20 }$