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
Avai 0 Chapecoense 1 -0.4
+0.2
CSA 0 Fluminense 1 +0.2
+0.1
Botafogo 1 Corinthians 0 +0.1
Cruzeiro 0 CSA 1 -0.1
Week of 12/1100.0*Serie B100.0*Average seed
Chapecoense 3 CSA 0 +0.1
Santos 2 Chapecoense 0 -0.1
CSA 1 Bahia 2 +0.1
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