Question: Simplify $\frac{2^{-2}m^{-3}}{n^{0}}$. Write your answer using only positive exponents.
1. **State the problem:** Simplify the expression $$\frac{2^{-2}m^{-3}}{n^{0}}$$ and write the answer using only positive exponents.
2. **Recall important rules:**
- Any number raised to the zero power is 1, so $$n^{0} = 1$$.
- Negative exponents mean the reciprocal, for example, $$a^{-b} = \frac{1}{a^{b}}$$.
3. **Simplify the denominator:**
Since $$n^{0} = 1$$, the expression becomes:
$$\frac{2^{-2}m^{-3}}{1} = 2^{-2}m^{-3}$$
4. **Rewrite negative exponents as positive:**
$$2^{-2} = \frac{1}{2^{2}} = \frac{1}{4}$$
$$m^{-3} = \frac{1}{m^{3}}$$
5. **Combine the terms:**
$$2^{-2}m^{-3} = \frac{1}{4} \times \frac{1}{m^{3}} = \frac{1}{4m^{3}}$$
**Final answer:**
$$\boxed{\frac{1}{4m^{3}}}$$