To simplify \( 4 - \frac{1}{2} \), you can first convert 4 into a fraction with a denominator of 2:
\[ 4 = \frac{8}{2} \]
Now you can perform the subtraction:
\[ \frac{8}{2} - \frac{1}{2} = \frac{8 - 1}{2} = \frac{7}{2} \]
So, the simplified result is:
\[ \frac{7}{2} \]
Alternatively, you can express \(\frac{7}{2}\) as a mixed number:
\[ \frac{7}{2} = 3 \frac{1}{2} \]
Thus, the answer is \(\frac{7}{2}\) or \(3 \frac{1}{2}\).