3. Simplify the expression \( \frac{6xy^2}{16xy^5} \).

Divide numerator and denominator by their common factors: \( \frac{6}{16} = \frac{3}{8} \), \( x \) cancels out, and \( y^2 \) reduces to \( y^{-3} \). The result is \( \frac{3}{8y^3} \).