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*Chance in playoffs100.0*Serie B100.0*Average seed
Bahia 2 Gama 1 Out
+6.7
-1.4
Sao Paulo 3 Flamengo 1 -1.6
+0.1
Portuguesa 1 Cruzeiro 3 +0.6
-0.1
Goias 2 Coritiba 1 +0.0
Ponte Preta 1 Juventude 0 -0.6
+0.1
Vasco da Gama 2 Gremio 0 -0.1
Gama 4 Atletico-PR 1 -11.6
+1.7
Sport Recife 1 Botafogo-SP 2 +2.5
-0.1
America-MG 1 Bahia 2 -2.1
+0.1
Coritiba 1 Santa Cruz 0 -2.1
+0.0
Flamengo 1 Internacional 2 -2.0
+0.1
Botafogo-SP 2 Vitoria 0 +1.1
Botafogo 2 Corinthians 4 -0.4
-0.0
Santa Cruz 2 America-MG 1 -0.3
+0.1
Juventude 1 Botafogo 3 +0.2
-0.1
Cruzeiro 1 Sao Paulo 4 +0.1
Sao Caetano 2 Guarani 0 +0.1
Parana 0 Fluminense 1 +0.1
Vitoria 1 Goias 0 -0.1
Palmeiras 1 Vasco da Gama 3 -0.1
Week of 11/24100.0*Chance in playoffs100.0*Serie B100.0*Average seed
Juventude 2 Gama 1 -1.4
Internacional 0 Corinthians 2 -0.2
Palmeiras 2 Cruzeiro 1 +0.2
Portuguesa 2 Botafogo 1 +0.2
Botafogo-SP 0 Parana 2 -0.2
Atletico-PR 2 Guarani 2 -0.0
Bahia 1 Coritiba 1 +0.0
Week of 12/1100.0*Chance in playoffs100.0*Serie B100.0*Average seed
Gama 5 Botafogo-SP 0 +0.6
Botafogo 2 Sao Caetano 4 +0.3
Cruzeiro 4 Internacional 2 -0.3
America-MG 1 Juventude 1 +0.2
Points
Chance Will Make Playoffs