According to the rounding rules, how should numbers from 120.5 to 120.9 be adjusted?

When dealing with rounding rules, numbers that are at the halfway point or above, such as 120.5 to 120.9, are typically rounded up to the next whole number. This principle is part of common rounding conventions, where any number that has a fractional part of .5 or greater is rounded up.

In this case, since 120.5 is the minimum in the range, it would round up to 121. Similarly, any number leading up to 120.9 would also round to 121 as they all exceed the halfway point of 120. Therefore, the adjustment to 121 for the numbers in the specified range adheres to the established rounding rules.