Let's just multiply this out, and then simplify it if possible. This will ensure it is in it's simplest form.
$$\begin{array}{l}
\frac{-2}{5}\times(-7)\times\frac{7}{-6}\\\\
\frac{-2\times-7}{5}\times\frac{7}{-6}\\\\
\frac{14}{5}\times\frac{7}{-6}\\\\
\frac{14\times7}{5\times-6}\\\\
\frac{98}{-30}\\\\
-\frac{98}{30}\\\\
-3\frac{8}{30}\\\\
-3\frac{4}{15}\\\\
\end{array}$$
This can't be simplified any further, so this is our final answer.
Let's just multiply this out, and then simplify it if possible. This will ensure it is in it's simplest form.
$$\begin{array}{l}
\frac{-2}{5}\times(-7)\times\frac{7}{-6}\\\\
\frac{-2\times-7}{5}\times\frac{7}{-6}\\\\
\frac{14}{5}\times\frac{7}{-6}\\\\
\frac{14\times7}{5\times-6}\\\\
\frac{98}{-30}\\\\
-\frac{98}{30}\\\\
-3\frac{8}{30}\\\\
-3\frac{4}{15}\\\\
\end{array}$$
This can't be simplified any further, so this is our final answer.