Answer:
-2.0
Step-by-step explanation:
Given
Number = -2.1
Required
Determine the other number
From the question, we understand that the number is represented on a vertical number.
From bottom to top, numbers on a vertical number line increases.
Since the other number is at the top of -2.1, then we can conclude that this number is greater than-2.1
Hence, possible values are ,-2.0, -1.9, etc.