Solve the Division Problem: Converting 15.5:100 to Decimal Form

To solve the division of $15.5$ by $100$, we follow these steps:

• Step 1: Identify the position of the decimal point in $15.5$. Initially, the decimal point is just after the digit $15$.
• Step 2: Move the decimal point two places to the left. This is because dividing by $100$ shifts the decimal to the left by two places. Thus, $15.5$ becomes $0.155$.

Therefore, the result of $15.5 \div 100$ is $\boxed{0.155}$.