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 -2.5
-0.2
Paysandu 3 Sao Paulo 0 +1.7
+0.3
Week of 5/24100.0*Chance in playoffs100.0*Average seed
Bahia 0 Santos 2 -7.9
-0.2
Internacional 0 Sport Recife 0 -3.7
-0.5
Guarani 0 Atletico-MG 1 +3.2
+0.2
Fluminense 1 Cruzeiro 1 -2.8
+0.0
Flamengo 3 Goias 1 -2.4
-0.2
Palmeiras 1 Atletico-PR 0 -1.0
-0.0
Cruzeiro 1 Portuguesa 1 -0.2
+0.1
Botafogo 0 Bragantino 2 -0.2
Week of 5/31100.0*Chance in playoffs100.0*Average seed
Flamengo 2 Internacional 0 -41.1
-2.0
Guarani 2 Botafogo 1 -13.9
-0.5
Sao Paulo 2 Nautico 0 -8.5
-0.2
Sport Recife 0 Palmeiras 2 -6.5
-0.2
Vasco da Gama 0 Santos 0 -5.9
-0.1
Atletico-PR 0 Corinthians 1 -5.5
-0.3
Games Above .500
Chance Will Make Playoffs