Answer
$\frac{2}{3}$
Work Step by Step
We can write the given ratio as a fraction and then simplify in lowest terms.
$\frac{.30dollars}{.45dollars}$
Since both the denominator and numerator have the same unit, we can divide out the common unit.
$\frac{.30}{.45}=\frac{.30\div.15}{.45\div.15}=\frac{2}{3}$