Math Problem Solver

\[ \frac{1}{2} - \frac{7}{4} = - \frac{5}{4} = -1.25 \]

The sum can be computed by rewriting each term over a common denominator, where the least common denominator of \(\frac{1}{2}\) and \(\frac{-7}{4}\) is \(4\). \[ \begin{aligned} \frac{1}{2} - \frac{7}{4} &= \frac{1 \cdot 2}{2 \cdot 2} + \frac{-7 \cdot 1}{4 \cdot 1} \\ &= \frac{2 + -7}{4} \\ &= \frac{-5}{4} \end{aligned} \]