Math Problem Solver

\[ 1 - \frac{3}{10} = \frac{7}{10} = 0.7 \]

The sum can be computed by rewriting each term over a common denominator, where the least common denominator of \(\frac{1}{1}\) and \(\frac{-3}{10}\) is \(10\). \[ \begin{aligned} 1 - \frac{3}{10} &= \frac{1 \cdot 10}{1 \cdot 10} + \frac{-3 \cdot 1}{10 \cdot 1} \\ &= \frac{10 + -3}{10} \\ &= \frac{7}{10} \end{aligned} \]