Question: Write an expression to match the description.
Subtract one-half of $n$ from $15$.
1. **State the problem:** We need to write an expression that represents subtracting one-half of $n$ from $15$.
2. **Understand the terms:** "One-half of $n$" means $\frac{1}{2}n$ or $\frac{n}{2}$.
3. **Form the expression:** Subtracting one-half of $n$ from $15$ means starting with $15$ and subtracting $\frac{1}{2}n$.
4. **Write the expression:** $$15 - \frac{1}{2}n$$
This expression correctly represents the description given.