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
Paysandu 3 Sao Paulo 0 -18.4
-1.4
Corinthians 1 Fluminense 0 -2.7
-0.2
Week of 5/24100.0*Chance in playoffs100.0*Average seed
Flamengo 3 Goias 1 -7.1
-0.3
Bahia 0 Santos 2 -6.2
-0.3
Guarani 0 Atletico-MG 1 +3.6
+0.1
Palmeiras 1 Atletico-PR 0 -2.8
-0.1
Fluminense 1 Cruzeiro 1 -2.3
+0.1
Internacional 0 Sport Recife 0 +1.7
+0.0
Cruzeiro 1 Portuguesa 1 -1.3
-0.0
Botafogo 0 Bragantino 2 -0.1
Week of 5/31100.0*Chance in playoffs100.0*Average seed
Sao Paulo 2 Nautico 0 In
+2.4
Sport Recife 0 Palmeiras 2 -6.0
-0.4
Guarani 2 Botafogo 1 -6.0
-0.4
Atletico-PR 0 Corinthians 1 -3.5
-0.3
Flamengo 2 Internacional 0 +3.1
-0.0
Vasco da Gama 0 Santos 0 -3.1
+0.1
Atletico-MG 0 Paysandu 0 +0.1
Games Above .500
Chance Will Make Playoffs