Answer:
[tex]\dfrac{-1}{5}[/tex]
Step-by-step explanation:
[tex]\dfrac{15}{7}*\dfrac{-21}{9} = \dfrac{5}{1}*\dfrac{-3}{3}\\\\=5*(-1)\\\\ =-5[/tex]
[tex]\sf \text{Reciprocal of (-5) = $\dfrac{-1}{5}$}[/tex]
