How are these numbers calculated?

Big Games

How we did last week and who we should root for this week.   Explain

Week of 2/18100.0*Chance wins title100.0*Average seed
Canada 34 United States 51 -5.3
Chile 10 Argentina XV 45 +2.9
Uruguay 23 Brazil 12 +0.2
Week of 2/25100.0*Chance wins title100.0*Average seed
Argentina XV 79 Brazil 7 +1.9
Chile 9 United States 57 -0.8
If winner is:HomeDrawAway
Week of 3/3100.0*Chance wins title100.0*Average seed
Argentina XV vs United StatesYesYesNo

What If

Chances based on how well the Argentina XV finish out the regular season.   Explain

If finish:ChanceChance will finish season at seed
TPW-OTLDwins title123456Count

* Row combines multiple less frequent records.

Chance Will Win Championship