Solve Decimal Subtraction: Finding 0.2 - 0.1

To solve this problem, let's follow these steps:

• Step 1: Identify the decimal numbers involved, which are $0.2$ and $0.1$.
• Step 2: Align the decimal points for the numbers vertically and perform the subtraction.

Now, let's proceed with the calculation:

$0.2 - 0.1 = 0.1$ The operation involves subtracting $0.1$ from $0.2$ by aligning the decimal points. Since both numbers have only one decimal place, the decimals align easily, making the subtraction straightforward.

Therefore, the result of the subtraction
$0.2 - 0.1$ is $0.1$.

The correct choice from the given options is Choice 2: $0.1$.