To divide fractions, you multiply by the reciprocal of the divisor.
So, \( \frac{4}{5} \div \frac{1}{3} \) can be rewritten as:
\[ \frac{4}{5} \times \frac{3}{1} \]
Now, multiply the numerators and the denominators:
\[ \frac{4 \times 3}{5 \times 1} = \frac{12}{5} \]
So, \( \frac{4}{5} \div \frac{1}{3} = \frac{12}{5} \) or 2.4 when expressed as a decimal.