Answer
$\frac{657}{11434}=0.05746\approx0.057$
Work Step by Step
There are 657 radio stations with a Classic Hits music format.
There are 11434 total stations.
The fraction of the two is:
$\frac{657}{11434}=0.05746$
By rounding it to the nearest thousandth:
$\frac{657}{11434}=0.05746\approx0.057$