Math Problem Solver

\[ \frac{125}{8} - \frac{9}{4} = \frac{107}{8} = 13.375 \]

The sum can be computed by rewriting each term over a common denominator, where the least common denominator of \(\frac{125}{8}\) and \(\frac{-9}{4}\) is \(8\). \[ \begin{aligned} \frac{125}{8} - \frac{9}{4} &= \frac{125 \cdot 1}{8 \cdot 1} + \frac{-9 \cdot 2}{4 \cdot 2} \\ &= \frac{125 + -18}{8} \\ &= \frac{107}{8} \end{aligned} \]