Verified Answer :

\(\frac{7}{9} = 0.777777777777777...\)

To get a percentage, you need to first round the decimal to the hundreths place. Whenever you have a number greater than 5, you round up.
Therefore, you can round it to 0.78.
Now to get the percentage you multiply it by 100.

\(0.78*100 = 78\)

This shows your answer is (c) 78%.

\(\frac{7}{9}\) ≈ \(0.77777..\)

\(0.7777\) ≈ \(0.78\)

\(0.78*100=78\)          \(\boxed{->C}\)

The answer is 78%