How are these numbers calculated?

Big Games

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

Week of 11/19100.0*Serie B100.0*Average seed
Atletico-GO 1 Chapecoense 1 +0.3
Vitoria 1 Cruzeiro 1 +0.1
Sport Recife 1 Bahia 0 -0.2
Week of 11/25100.0*Serie B100.0*Average seed
Gremio 1 Atletico-GO 1 -0.1
Week of 12/3None

What If

Chances based on how well the Atletico-GO finish out the regular season.   Explain

If finish:ChanceChance will finish season at seed
TPW-D-Lwins titleLibertadores1234567891011121314151617181920Serie BCount

* Row combines multiple less frequent records.

Chance Will Win Championship