How are these numbers calculated?

Big Games

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

Week of 11/15100.0*Serie B100.0*Average seed
Santa Cruz 2 America-MG 1 +19.4
-1.3
America-MG 1 Bahia 2 +14.5
-0.8
Sport Recife 1 Botafogo-SP 2 +4.5
-0.2
Coritiba 1 Santa Cruz 0 -3.8
+0.1
Sao Paulo 3 Flamengo 1 -3.3
+0.1
Flamengo 1 Internacional 2 -3.0
+0.1
Botafogo-SP 2 Vitoria 0 +2.4
-0.1
Gama 4 Atletico-PR 1 +2.1
-0.1
Portuguesa 1 Cruzeiro 3 +1.5
-0.2
Ponte Preta 1 Juventude 0 -0.8
+0.1
Botafogo 2 Corinthians 4 -0.8
Bahia 2 Gama 1 -0.7
+0.1
Juventude 1 Botafogo 3 +0.6
-0.1
Vasco da Gama 2 Gremio 0 -0.1
Cruzeiro 1 Sao Paulo 4 +0.0
Sao Caetano 2 Guarani 0 +0.0
Week of 11/24100.0*Serie B100.0*Average seed
Goias 3 America-MG 0 +13.4
-0.6
Juventude 2 Gama 1 +10.1
-0.2
Botafogo-SP 0 Parana 2 -7.1
+0.2
Santa Cruz 1 Vitoria 1 -1.9
+0.1
Sao Caetano 2 Flamengo 0 -1.6
+0.1
Ponte Preta 2 Sport Recife 1 +0.0
Week of 12/1100.0*Serie B100.0*Average seed
Gama 5 Botafogo-SP 0 -17.5
+0.2
Guarani 1 Santa Cruz 2 +7.8
-0.4
America-MG 1 Juventude 1 +5.6
+0.1
Flamengo 2 Palmeiras 0 +5.5
-0.4
Points
Chance Will Make Playoffs