How are these numbers calculated?

Big Games

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

Week of 5/23100.0*Chance in playoffs100.0*Average seed
Corinthians 1 Fluminense 0 -2.6
-0.2
Paysandu 3 Sao Paulo 0 +2.1
+0.2
Week of 5/24100.0*Chance in playoffs100.0*Average seed
Bahia 0 Santos 2 -7.3
-0.3
Fluminense 1 Cruzeiro 1 -3.1
Flamengo 3 Goias 1 -2.8
-0.2
Guarani 0 Atletico-MG 1 +2.5
+0.2
Palmeiras 1 Atletico-PR 0 -0.9
-0.0
Cruzeiro 1 Portuguesa 1 -0.7
+0.0
Internacional 0 Sport Recife 0 +0.5
-0.2
Botafogo 0 Bragantino 2 -0.1
Week of 5/31100.0*Chance in playoffs100.0*Average seed
Flamengo 2 Internacional 0 -39.6
-2.0
Guarani 2 Botafogo 1 -13.0
-0.4
Sao Paulo 2 Nautico 0 -11.7
-0.3
Sport Recife 0 Palmeiras 2 -7.1
-0.2
Atletico-PR 0 Corinthians 1 -6.6
-0.3
Vasco da Gama 0 Santos 0 -4.2
Games Above .500
Chance Will Make Playoffs