## Basic College Mathematics (9th Edition)

$\frac{7}{5}$
We can write the ratio 35 mpg (miles per gallon) to 25 mpg as the fraction $\frac{35mpg}{25mpg}$. Since both the denominator and numerator have the same unit, we can divide out the common unit. $\frac{35}{25}=\frac{35\div5}{25\div5}=\frac{7}{5}$