Decimal Comparison: Find the Missing Sign Between 0.2 and 0.3

To solve this problem, we'll follow these steps:

• Step 1: Compare the decimal numbers based on their representation.
• Step 2: Determine the correct relational sign.

Let's work through each step:

Step 1: We are given the numbers $0.2$ and $0.3$. These numbers have one decimal place each.

The tenths digit of $0.2$ is $2$, and the tenths digit of $0.3$ is $3$.

Step 2: Comparing these tenths digits, we observe:

$2 \lt 3$, which means that $0.2 \lt 0.3$.
Therefore, the correct mathematical relation between $0.2$ and $0.3$ is the sign $\lt$.

Hence, the correct relationship to fill in the blank is: $0.2 \lt 0.3$.