How are these numbers calculated?

Big Games

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

Week of 10/24100.0*Chance in playoffs100.0*Serie B100.0*Average seed
Gremio 2 America-RN 1 +10.7
No
+1.1
Cruzeiro 3 Palmeiras 1 -2.6
-0.2
Vasco da Gama 3 Coritiba 1 -2.6
-0.2
Vasco da Gama 0 Vitoria 1 +1.5
-0.0
Flamengo 2 Guarani 1 -1.5
-0.1
America-MG 2 Atletico-PR 1 +1.3
+0.2
Coritiba 1 Atletico-MG 1 +0.5
+0.0
Portuguesa 1 Internacional 1 +0.3
Sport Recife 2 Botafogo 1 -0.3
+0.0
Goias 2 Juventude 2 +0.1
+0.0
Sao Paulo 1 Corinthians 2 +0.1
Week of 10/31100.0*Chance in playoffs100.0*Serie B100.0*Average seed
Guarani 1 Gremio 3 +21.2
+1.3
Atletico-MG 1 Sport Recife 0 -5.8
-0.2
Atletico-PR 1 Cruzeiro 2 -5.1
-0.1
Flamengo 2 America-MG 0 -3.2
-0.2
Internacional 0 Botafogo 0 +2.5
+0.1
Vitoria 2 Corinthians 3 +0.6
+0.1
Portuguesa 3 Bragantino 1 -0.0
Week of 11/7100.0*Chance in playoffs100.0*Serie B100.0*Average seed
Gremio 4 Portuguesa 2 +26.5
+1.6
Cruzeiro 5 Juventude 0 -7.0
-0.2
Ponte Preta 0 Atletico-MG 0 +6.1
+0.2
Goias 2 Vasco da Gama 2 +6.1
+0.1
Parana 2 Flamengo 1 +5.1
+0.4
Palmeiras 2 Vasco da Gama 1 +2.2
+0.1
Coritiba 1 Internacional 0 +0.3
Points
Chance Will Make Playoffs