Сумма чисел $$2 \frac{4}{9} + 8 \frac{3}{27} = 2 \frac{4 \cdot 3}{9 \cdot 3} + 8 \frac{3}{27} = 2 \frac{12}{27} + 8 \frac{3}{27} = 10 \frac{15}{27} = 10 \frac{5}{9}$$.
Ответ: $$10 \frac{5}{9}$$