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 +0.4
-0.2
Sport Recife 1 Bahia 0 +0.1
-0.1
Vitoria 1 Cruzeiro 1 +0.1
Avai 2 Palmeiras 1 -0.1
Week of 11/25None
Week of 12/3None
Points
Chance Will Win Championship