Math Problem Solver

\[ \frac{7}{10} - \frac{3}{15} = \frac{1}{2} = 0.5 \]

The sum can be computed by rewriting each term over a common denominator, where the least common denominator of \(\frac{7}{10}\) and \(\frac{-3}{15}\) is \(30\). \[ \begin{aligned} \frac{7}{10} - \frac{3}{15} &= \frac{7 \cdot 3}{10 \cdot 3} + \frac{-3 \cdot 2}{15 \cdot 2} \\ &= \frac{21 + -6}{30} \\ &= \frac{15}{30} \\&= \frac{1}{2} \end{aligned} \]