Math Problem Solver

\[ 2\frac{1}{8} - \frac{3}{4} = \frac{11}{8} = 1.375 \]

The sum can be computed by rewriting each term over a common denominator, where the least common denominator of \(\frac{2}{1}\), \(\frac{1}{8}\), and \(\frac{-3}{4}\) is \(8\). \[ \begin{aligned} 2\frac{1}{8} - \frac{3}{4} &= \frac{2 \cdot 8}{1 \cdot 8} + \frac{1 \cdot 1}{8 \cdot 1} + \frac{-3 \cdot 2}{4 \cdot 2} \\ &= \frac{16 + 1 + -6}{8} \\ &= \frac{11}{8} \end{aligned} \]