Answer:
[tex]\frac{7}{9}[/tex]
Step-by-step explanation:
If you add a number that is negative, you are basically subtracting it.
This means that
[tex]\frac{8}{9}+\left(-\frac{1}{9}\right)=\frac{8}{9}-\frac{1}{9}[/tex]
Since they both have the same denominator, you can easily subtract the fractions: [tex]\frac{8-1}{9}=\frac{7}{9}[/tex]
