Gunnar, you forgot about "Significant digits" concept. When rounding to nearest tenths, all digits after hundredths ignored.

>>Hi to all,
>>
>>Here is the controversy:

12.345   -> 12.3
>>         -> 12.4

In my opinion, the first one (12.3) is the correct 'mathematical rounding' (to 1 decimal here). However, some colleagues say the second one is correct.
>>
>>Please, tell me that I'm correct! ;)
>
>
>sorry, but you are incorrect.
>
>roundiung starts at the very end. therefore, the 5 gets rounded up, changing the 4 into a five.
>
>since the 4 is a 5 now, this one gets rounded up making out of the 3 a 4.
>
>so you end up with 12.4
>
>if you limit the round() function to how many decimals it is supposed to look at the result will change.
>
>?round(12.345, 1) = 12.3 because the function ignores the 5