<|system|>
An infinite geometric series has first term $328$ and a sum of $2009$. What is its common ratio?</s>.
<|user|>
Can you answer based on context?
<|assistant|>
Since this is an infinite geometric series, we have $\frac{328}{1-r} = 2009$. Solving for $r$, we find that $r = \frac{41}{49}$.