Math Problem Solver

$$\frac{3}{15} - \frac{1}{10} = \frac{1}{10} = 0.1$$

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