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
Coritiba 1 Santa Cruz 0 +16.4
-0.8
Santa Cruz 2 America-MG 1 -16.1
+1.0
Flamengo 1 Internacional 0 +6.4
-0.3
Sport Recife 1 Botafogo-SP 2 +3.7
-0.1
America-MG 1 Bahia 2 -3.2
+0.1
Sao Paulo 3 Flamengo 1 -1.4
+0.1
Gama 4 Atletico-PR 1 +1.3
-0.1
Portuguesa 1 Cruzeiro 3 +1.0
Botafogo-SP 2 Vitoria 0 +0.9
-0.2
Ponte Preta 1 Juventude 0 -0.7
Botafogo 2 Corinthians 4 -0.7
Juventude 1 Botafogo 3 -0.4
Bahia 2 Gama 1 -0.3
Guarani 1 Parana 0 +0.1
-0.0
Week of 11/24100.0*Serie B100.0*Average seed
Portuguesa 2 Botafogo 1 -0.1
Week of 12/1100.0*Serie B100.0*Average seed
Guarani 1 Santa Cruz 2 -19.0
+1.2
Flamengo 2 Palmeiras 0 Yes
-0.2
Gama 5 Botafogo-SP 0 -3.5
+0.1
America-MG 1 Juventude 1 -3.0
-0.0
Points
Chance Will Make Playoffs