Math Problem Solver

\[ \frac{4}{8} - \frac{8}{4} = - \frac{3}{2} = -1.5 \]

The sum can be computed by rewriting each term over a common denominator, where the least common denominator of \(\frac{4}{8}\) and \(\frac{-8}{4}\) is \(8\). \[ \begin{aligned} \frac{4}{8} - \frac{8}{4} &= \frac{4 \cdot 1}{8 \cdot 1} + \frac{-8 \cdot 2}{4 \cdot 2} \\ &= \frac{4 + -16}{8} \\ &= \frac{-12}{8} \\&= - \frac{3}{2} \end{aligned} \]