Which division expression is equivalent to the complex fraction below? $$ \frac{\frac{4}{5}}{\frac{2}{3}} $$

$ \frac{4}{5} \times \frac{2}{3} $

$ \frac{2}{3} \div \frac{4}{5} $

$ \frac{4}{5} \div \frac{2}{3} $

$ \frac{5}{4} \div \frac{3}{2} $

What is the correct first step to simplify the complex fraction $ \frac{4\frac{1}{2}}{\frac{3}{4}} $?

Flip the fraction in the denominator to get $ \frac{4}{3} $.

Rewrite the problem as $ \frac{4\frac{1}{2}}{1} \times \frac{4}{3} $.

Convert the mixed number $ 4\frac{1}{2} $ to the improper fraction $ \frac{9}{2} $.

Find a common denominator for the two fractions.