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
Flamengo 2 Guarani 1 +9.4
No
+2.0
Vasco da Gama 3 Coritiba 1 -2.1
-0.2
Cruzeiro 3 Palmeiras 1 -1.0
-0.2
Gremio 2 America-RN 1 -1.0
-0.2
Vasco da Gama 0 Vitoria 1 +0.7
-0.1
America-MG 2 Atletico-PR 1 +0.6
+0.1
Portuguesa 1 Internacional 1 +0.5
+0.0
Coritiba 1 Atletico-MG 1 +0.5
+0.0
Sport Recife 2 Botafogo 1 -0.2
+0.1
Goias 2 Juventude 2 +0.1
Sao Paulo 1 Corinthians 2 +0.1
Ponte Preta 2 Bragantino 2 +0.0
Week of 10/31100.0*Chance in playoffs100.0*Serie B100.0*Average seed
Flamengo 2 America-MG 0 +21.9
+1.6
Atletico-MG 1 Sport Recife 0 -4.8
-0.2
Atletico-PR 1 Cruzeiro 2 -4.2
-0.1
Guarani 1 Gremio 3 -3.0
-0.2
Internacional 0 Botafogo 0 +2.1
+0.1
Vitoria 2 Corinthians 3 +0.6
+0.2
Week of 11/7100.0*Chance in playoffs100.0*Serie B100.0*Average seed
Parana 2 Flamengo 1 Out
-1.4
Cruzeiro 5 Juventude 0 -11.3
-0.3
Ponte Preta 0 Atletico-MG 0 +6.5
+0.1
Palmeiras 2 Vasco da Gama 1 +5.3
+0.2
Goias 2 Vasco da Gama 2 +5.0
Gremio 4 Portuguesa 2 -2.7
-0.3
Coritiba 1 Internacional 0 +0.4
+0.3
Points
Chance Will Make Playoffs