To evaluate the expression \( \frac{1}{6} \div -\frac{2}{5} \cdot \frac{5}{2} \), we will follow the order of operations.
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Evaluate the multiplication \( -\frac{2}{5} \cdot \frac{5}{2} \): \[ -\frac{2}{5} \cdot \frac{5}{2} = -\frac{2 \cdot 5}{5 \cdot 2} = -\frac{10}{10} = -1 \]
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Now we proceed with the division \( \frac{1}{6} \div -1 \): \[ \frac{1}{6} \div -1 = \frac{1}{6} \cdot -1 = -\frac{1}{6} \]
Therefore, the evaluated expression is:
\[ \boxed{-\frac{1}{6}} \]