How are these numbers calculated?

Big Games

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

Week of 11/17100.0*Serie B100.0*Average seed
Vasco da Gama 2 Sao Paulo 0 -25.9
+1.3
Corinthians 1 Vasco da Gama 0 +15.6
-1.0
America-MG 2 Santos 1 +4.2
-0.2
Gremio 2 Chapecoense 0 -3.3
+0.1
Sport Recife 0 Flamengo 1 -2.9
+0.1
Vitoria 1 Atletico-PR 2 -2.9
+0.1
Palmeiras 4 America-MG 0 -2.7
+0.1
Cruzeiro 3 Vitoria 0 -2.4
+0.1
Chapecoense 2 Sport Recife 1 +1.8
-0.0
Ceara 1 Parana 0 +1.5
-0.1
Bahia 2 Fluminense 0 -0.2
Week of 11/25100.0*Serie B100.0*Average seed
America-MG 1 Bahia 0 +3.6
-0.1
Vasco da Gama 0 Palmeiras 1 +3.1
-0.5
Corinthians 0 Chapecoense 0 -1.8
+0.2
Internacional 2 Fluminense 0 -0.6
+0.1
Vitoria 0 Gremio 0 -0.4
Atletico-PR 2 Ceara 2 +0.2
-0.0
Week of 12/1100.0*Serie B100.0*Average seed
Chapecoense 1 Sao Paulo 0 +12.9
-0.5
Sport Recife 2 Santos 1 +11.8
-0.3
Ceara 0 Vasco da Gama 0 No
-0.6
Fluminense 1 America-MG 0 -6.0
-0.1
Gremio 1 Corinthians 0 +0.2
Points
Chance Will Win Championship