Math Problem Solver

\[ \frac{3}{4} - 0.3 = \frac{9}{20} = 0.45 \]

The sum can be computed by rewriting each term over a common denominator, where the least common denominator of \(\frac{3}{4}\) and \(\frac{-3}{10}\) is \(20\). \[ \begin{aligned} \frac{3}{4} - 0.3 &= \frac{3 \cdot 5}{4 \cdot 5} + \frac{-3 \cdot 2}{10 \cdot 2} \\ &= \frac{15 + -6}{20} \\ &= \frac{9}{20} \end{aligned} \]