1. The problem is to simplify the expression $-\left(\frac{-7}{-9}\right)$.\n\n2. Recall that a negative divided by a negative is positive, so $\frac{-7}{-9} = \frac{7}{9}$.\n\n3. Now the expression becomes $-\left(\frac{7}{9}\right)$.\n\n4. Applying the negative sign outside the parentheses, we get $-\frac{7}{9}$.\n\n5. Therefore, the simplified expression is $-\frac{7}{9}$.