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Completion requirements
Evaluate and simplify the expression \(\frac{8}{{15}} - \frac{3}{5}\).
The LCD is 15.
\[\begin{align}
\frac{8}{{15}} - \frac{{3\left( {\color{red}3} \right)}}{{5\left( {\color{red}3} \right)}} &= \frac{8}{{15}} - \frac{9}{{15}} \\
&= \frac{{8 - 9}}{{15}} \\
&= -\frac{1}{{15}} \\
\end{align}\]
\frac{8}{{15}} - \frac{{3\left( {\color{red}3} \right)}}{{5\left( {\color{red}3} \right)}} &= \frac{8}{{15}} - \frac{9}{{15}} \\
&= \frac{{8 - 9}}{{15}} \\
&= -\frac{1}{{15}} \\
\end{align}\]