To find the monthly decrease in the car's value, you can divide the total decrease in value by the number of months.
The total decrease is $4,000 over 12 months.
We can set up the division as follows:
\[ \text{Decrease per month} = \frac{\text{Total decrease}}{\text{Number of months}} = \frac{-4000}{12} \]
Now, calculating \( \frac{-4000}{12} \):
\[ \frac{-4000}{12} \approx -333.33 \]
Rounding to the nearest hundredth, the result is \(-333.33\).
Therefore, the answer is:
−$333.33