To multiply powers of the same base, add their exponents. Add $\frac{4}{5}$ and $\frac{1}{2}$ to get $\frac{13}{10}$.
$$\frac{c^{\frac{13}{10}}}{c^{\frac{2}{5}}}$$
To divide powers of the same base, subtract the denominator's exponent from the numerator's exponent. Subtract $\frac{2}{5}$ from $\frac{13}{10}$ to get $\frac{9}{10}$.
To divide powers of the same base, subtract the denominator's exponent from the numerator's exponent. Subtract $\frac{2}{5}$ from $\frac{13}{10}$ to get $\frac{9}{10}$.
