Math Problem Solver

$$\frac{4}{6} - \frac{5}{18} = \frac{7}{18} = 0.3\overline{8}$$

The sum can be computed by rewriting each term over a common denominator, where the least common denominator of $\frac{4}{6}$ and $\frac{-5}{18}$ is $18$. $$\begin{aligned} \frac{4}{6} - \frac{5}{18} &= \frac{4 \cdot 3}{6 \cdot 3} + \frac{-5 \cdot 1}{18 \cdot 1} \\ &= \frac{12 + -5}{18} \\ &= \frac{7}{18} \end{aligned}$$