Answer:
[tex]\large\boxed{-\dfrac{8}{9}\cdot\left(-8\dfrac{8}{9}\right)=71\dfrac{1}{9}}[/tex]
Step-by-step explanation:
[tex]-\dfrac{8}{9}\cdot\left(-8\dfrac{8}{9}\right)\qquad\text{convert the mixed number to the improper fraction}\\\\=\dfrac{8}{9}\cdot\dfrac{8\cdot9+8}{9}=\dfrac{8}{9}\cdot\dfrac{80}{9}=\dfrac{640}{9}=71\dfrac{1}{9}[/tex]
