Rounded to 2 decimal places, $\frac{7}{9}$ is
(A) 0.70
(B) 0.77
(C) 0.78
(D) 0.79
(E) 0.80
Calculating, $\frac{7}{9}=7 \div 9=0.7777 \cdots=0 . \overline{7}$. Rounded to 2 decimal places, $\frac{7}{9}$ is 0.78 .

ANSWER: $(\mathrm{C})$