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
Sport Recife 1 Botafogo-SP 2 -20.3
+1.3
Botafogo-SP 2 Vitoria 0 -9.2
+0.7
Flamengo 1 Internacional 0 +3.8
-0.2
America-MG 1 Bahia 2 -2.9
+0.1
Gama 4 Atletico-PR 1 +2.8
-0.1
Coritiba 1 Santa Cruz 0 -2.6
+0.1
Sao Paulo 3 Flamengo 1 -1.3
+0.1
Ponte Preta 1 Juventude 0 -0.8
Bahia 2 Gama 1 -0.8
Portuguesa 1 Cruzeiro 3 +0.7
Santa Cruz 2 America-MG 1 -0.3
-0.1
Juventude 1 Botafogo 3 -0.3
Botafogo 2 Corinthians 4 -0.1
Week of 11/24100.0*Serie B100.0*Average seed
Portuguesa 2 Botafogo 1 +0.0
Week of 12/1100.0*Serie B100.0*Average seed
Flamengo 2 Palmeiras 0 Yes
-0.2
Gama 5 Botafogo-SP 0 Yes
-0.7
Guarani 1 Santa Cruz 2 -0.4
America-MG 1 Juventude 1 -0.0
Points
Chance Will Make Playoffs