Example 1.2.25

Let's add \(\frac{2}{3}+\frac{2}{5}\text{.}\) The denominators are \(3\) and \(5\text{,}\) so the number \(15\) would be a good common denominator.

\begin{align*} \frac{2}{3}+\frac{2}{5}\amp=\frac{2\multiplyright{5}}{3\multiplyright{5}}+\frac{2\multiplyright{3}}{5\multiplyright{3}}\\ \amp=\frac{10}{15}+\frac{6}{15}\\ \amp=\frac{16}{15} \end{align*}
in-context