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
Cruzeiro 0 CSA 1 +21.4
-0.5
CSA 0 Fluminense 1 +5.8
-0.1
Botafogo 1 Corinthians 0 +4.4
-0.1
Fluminense 1 Palmeiras 0 +3.4
-0.1
Ceara 1 Sao Paulo 1 +0.3
Atletico-MG 0 Athletico-PR 1 -0.1
Avai 0 Chapecoense 1 +0.1
Week of 12/1100.0*Serie B100.0*Average seed
Vasco da Gama 1 Cruzeiro 0 +14.0
-0.2
Gremio 2 Cruzeiro 0 +12.2
-0.1
Ceara 0 Corinthians 1 -8.9
+0.1
CSA 1 Bahia 2 -0.7
+0.1
Avai 1 Fluminense 1 +0.1
Chapecoense 3 CSA 0 +0.1
Week of 12/8100.0*Serie B100.0*Average seed
Botafogo 1 Ceara 1 Yes
-0.1
Cruzeiro 0 Palmeiras 2 Yes
-0.1
Points
Chance Will Win Championship