[tex]1 \div \frac{1}{15} \\ \\ \frac{1}{1} \div \frac{1}{15} = \dfrac{ \frac{1}{1} }{ \frac{1}{15} } \\ \\ \frac{1 \times 15}{1 \times 1} = \frac{15}{1} \\ \\ = \boxed{15}[/tex]
