Answer
$\dfrac{3y}{5}$
Work Step by Step
Cancelling the common factor in the numerator and the denominator, the given expression, $
\dfrac{9xy}{15x}
,$ simplifies to
\begin{array}{l}\require{cancel}
\dfrac{\cancel{3x}\cdot3y}{\cancel{3x}\cdot5}
\\\\=
\dfrac{3y}{5}
.\end{array}