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 +4.4
-0.1
Week of 5/24100.0*Serie B100.0*Average seed
Bahia 0 Santos 2 -5.4
+0.3
Cruzeiro 1 Portuguesa 1 +2.9
-0.3
Nautico 1 Vasco da Gama 1 -2.6
+0.1
Flamengo 3 Goias 1 -1.6
+0.1
Guarani 0 Atletico-MG 1 +0.2
-0.1
Week of 5/31100.0*Serie B100.0*Average seed
Goias 1 Portuguesa 1 -14.5
+0.0
Sao Paulo 2 Nautico 0 -8.3
+0.2
Atletico-MG 0 Paysandu 0 -8.3
+0.2
Bragantino 0 Bahia 0 +6.1
-0.1
Atletico-PR 0 Corinthians 1 +0.2
Games Above .500
Chance Will Make Playoffs