Solve :
`905.5+21.197`

Explanation

To solve the problem \( 905.5 + 21.197 \) step by step, we will use the column method for addition.

### Step 1: Align the numbers by the decimal point
First, we write the numbers one below the other, aligning them by the decimal point. Since \( 905.5 \) has only one digit after the decimal, we can add a zero to make it \( 905.500 \).

```
905.500
+ 21.197
...