The product of \( \frac{4}{5} \) and \( 15 \) can be calculated as follows:
\[ \frac{4}{5} \times 15 = \frac{4 \times 15}{5} = \frac{60}{5} = 12 \]
The number \( 12 \) is an integer. Therefore, the product of \( \frac{4}{5} \) and \( 15 \) is an integer.
In summary, the result is an integer.