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 -0.1
-0.1
Paysandu 3 Sao Paulo 0 +0.2
Week of 5/24100.0*Chance in playoffs100.0*Average seed
Botafogo 0 Bragantino 2 In
+0.7
Guarani 0 Atletico-MG 1 +0.1
+0.1
Flamengo 3 Goias 1 -0.1
-0.1
Internacional 0 Sport Recife 0 +0.1
+0.1
Cruzeiro 1 Portuguesa 1 +0.1
Nautico 1 Vasco da Gama 1 -0.0
Week of 5/31None
Games Above .500
Chance Will Make Playoffs