$\begin{aligned}\left(-\frac{1}{3}\right)^{3} & =\square \\ \frac{-5}{4^{2}} & =\square\end{aligned}$

Step 1 ：The problem is asking for the result of two separate calculations. The first calculation is raising -1/3 to the power of 3. The second calculation is dividing -5 by 4 squared.

Step 2 ：Calculate \((-\frac{1}{3})^{3}\) to get -0.03703703703703703

Step 3 ：Calculate \(\frac{-5}{4^{2}}\) to get -0.3125

Step 4 ：Final Answer: \(\boxed{-0.037}\) and \(\boxed{-0.3125}\)