Math Problem Solver

\[ \frac{1}{2} - 2 = - \frac{3}{2} = -1.5 \]

The sum can be computed by rewriting each term over a common denominator, where the least common denominator of \(\frac{1}{2}\) and \(\frac{-2}{1}\) is \(2\). \[ \begin{aligned} \frac{1}{2} - 2 &= \frac{1 \cdot 1}{2 \cdot 1} + \frac{-2 \cdot 2}{1 \cdot 2} \\ &= \frac{1 + -4}{2} \\ &= \frac{-3}{2} \end{aligned} \]