1. The problem is to divide 9 by 16, which is written as $9 \div 16$. 2. Division of two numbers can be expressed as a fraction: $\frac{9}{16}$. 3. Since 9 and 16 have no common factors other than 1, the fraction $\frac{9}{16}$ is already in its simplest form. 4. Therefore, the result of $9 \div 16$ is $\frac{9}{16}$ or 0.5625 in decimal form.