Translate the Stated Rule or Relationship to a Formula $\mathrm{e}$ , for a Car Is Calculated by Dividing the Number

Translate the stated rule or relationship to a formula.
-The gas mileage, $\mathrm{e}$ , for a car is calculated by dividing the number of miles driven, $\mathrm{m}$ , by the number of gallons, $\mathrm{g}$ , of gas used.

A) $\mathrm{e}=\mathrm{m}+\mathrm{g}$
B) $\mathrm{e}=\frac{\mathrm{m}}{\mathrm{g}}$
C) $\mathrm{e}=\frac{\mathrm{g}}{\mathrm{m}}$
D) $\mathrm{e}=\mathrm{mg}$