Unfortunately, official sources verifying this are both nonexistent or are very tough to search out; nonetheless, that is one thing that may simply be verified by halving ATK, LP, and so on repeatedly in any formally licensed Yu-Gi-Oh recreation – comparable to Duel Links or Legacy of the Duelist.
If I discover any direct footage of this occuring, I’ll add it to this reply immediately.
EDIT: So, I wasn’t capable of finding footage, however I used to be capable of finding this:
In the cardboard rulings for Solemn Judgement, underneath “Previously Official Rulings”, now we have:
If halving your Life Points ends in a fraction, your Life Points are rounded up.
Now, in fact, this can be a beforehand official ruling, however until there’s a ruling that straight states on the contrary, this ruling can/ought to nonetheless be thought of right. This additionally technically is a ruling for Solemn Judgement particularly, however I believe on this case it is a protected assumption that the concept is extensible.