Answer:
[tex] \frac{8}{x3y} [/tex]
Here you go.Hope this help!!
[tex]\\ \rm\hookrightarrow \dfrac{8x^4y^3}{x^7y^4}[/tex]
[tex]\\ \rm\hookrightarrow \dfrac{8x^{4-7}y^{3-4}}{}[/tex]
[tex]\\ \rm\hookrightarrow 8x^{-3}y^{-1}[/tex]
[tex]\\ \rm\hookrightarrow \dfrac{8}{x^3y}[/tex]
