How are these numbers calculated?

Big Games

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

Week of 10/25100.0*Chance in playoffs100.0*Average seed
Flamengo 1 Vitoria 0 -21.1
-0.9
Vitoria 1 Cruzeiro 1 -5.4
-0.2
Atletico-MG 3 America-RN 2 +3.2
+0.1
Palmeiras 5 Gremio 1 -2.8
-0.1
Santos 3 Bahia 1 -2.3
-0.1
Guarani 0 Juventude 0 +1.9
+0.0
Botafogo 0 Parana 0 +1.0
+0.1
Internacional 4 Flamengo 0 +0.6
+0.1
Coritiba 0 Atletico-PR 2 +0.3
+0.0
Sao Paulo 7 Uniao Sao Joao 1 -0.1
Week of 11/1100.0*Chance in playoffs100.0*Average seed
Vitoria 2 Santos 0 +27.4
+1.0
Juventude 2 Bragantino 1 -18.7
-0.3
America-RN 1 Sao Paulo 3 +4.5
+0.1
Juventude 1 Fluminense 1 +2.6
+0.0
Cruzeiro 2 Botafogo 3 -2.5
-0.2
Palmeiras 3 Goias 3 -0.5
-0.0
Corinthians 0 Sport Recife 1 -0.4
-0.1
Santos 2 America-RN 0 +0.3
-0.1
Flamengo 1 Coritiba 0 -0.2
Week of 11/8100.0*Chance in playoffs100.0*Average seed
Atletico-MG 3 Vitoria 2 -37.3
-0.6
Bahia 0 Juventude 0 +8.3
+0.1
Botafogo 3 Portuguesa 3 +2.7
+0.1
Points
Chance Will Make Playoffs