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*Serie B100.0*Average seed
Paysandu 3 Sao Paulo 0 +7.5
-0.1
Week of 5/24100.0*Serie B100.0*Average seed
Cruzeiro 1 Portuguesa 1 -5.8
Bahia 0 Santos 2 -4.6
+0.2
Flamengo 3 Goias 1 -0.6
+0.1
Nautico 1 Vasco da Gama 1 +0.2
Guarani 0 Atletico-MG 1 -0.1
Week of 5/31100.0*Serie B100.0*Average seed
Goias 1 Portuguesa 1 -9.0
+0.2
Bragantino 0 Bahia 0 +8.5
-0.2
Atletico-MG 0 Paysandu 0 -5.2
+0.2
Sao Paulo 2 Nautico 0 -4.6
+0.1
Atletico-PR 0 Corinthians 1 +0.2
Games Above .500
Chance Will Make Playoffs