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
Vitoria 1 Atletico-PR 2 +13.8
-0.6
Cruzeiro 3 Vitoria 0 +10.3
-0.5
Corinthians 1 Vasco da Gama 0 -2.0
+0.0
America-MG 2 Santos 1 +2.0
-0.2
Vasco da Gama 2 Sao Paulo 0 +1.8
-0.1
Gremio 2 Chapecoense 0 -1.5
+0.1
Sport Recife 0 Flamengo 1 -1.4
+0.1
Palmeiras 4 America-MG 0 -1.1
+0.1
Ceara 1 Parana 0 +0.8
-0.0
Chapecoense 2 Sport Recife 1 +0.5
-0.1
Bahia 2 Fluminense 0 -0.1
Week of 11/25100.0*Serie B100.0*Average seed
Vitoria 0 Gremio 0 +2.0
-0.2
America-MG 1 Bahia 0 +0.6
-0.2
Vasco da Gama 0 Palmeiras 1 -0.3
Atletico-PR 2 Ceara 2 +0.3
Corinthians 0 Chapecoense 0 -0.2
Internacional 2 Fluminense 0 -0.1
Week of 12/1100.0*Serie B100.0*Average seed
Palmeiras 3 Vitoria 2 -0.1
Sport Recife 2 Santos 1 -0.1
Points
Chance Will Win Championship