How are these numbers calculated?

Big Games

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

Week of 11/24100.0*Serie B100.0*Average seed
CSA 0 Fluminense 1 +4.9
-0.3
Cruzeiro 0 CSA 1 -2.3
+0.3
Botafogo 1 Corinthians 0 +0.7
Fluminense 1 Palmeiras 0 +0.2
Ceara 1 Sao Paulo 1 +0.1
Avai 0 Chapecoense 1 -0.1
Week of 12/1100.0*Serie B100.0*Average seed
CSA 1 Bahia 2 +2.1
-0.2
Ceara 0 Corinthians 1 -0.1
Chapecoense 3 CSA 0 Yes
-0.2
Vasco da Gama 1 Cruzeiro 0 +0.0
Santos 2 Chapecoense 0 +0.0
Week of 12/8100.0*Serie B100.0*Average seed
Vasco da Gama 1 Chapecoense 1 +0.2
CSA 1 Sao Paulo 2 -0.1
Points
Chance Will Win Championship