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 +21.7
-1.2
Flamengo 3 Goias 1 -3.1
+0.2
Nautico 1 Vasco da Gama 1 -1.9
+0.1
Guarani 0 Atletico-MG 1 +0.1
-0.1
Cruzeiro 1 Portuguesa 1 +0.0
Week of 5/31100.0*Serie B100.0*Average seed
Bragantino 0 Bahia 0 -9.5
-0.1
Sao Paulo 2 Nautico 0 -9.4
+0.2
Goias 1 Portuguesa 1 +8.7
+0.1
Atletico-MG 0 Paysandu 0 +4.9
-0.1
Games Above .500
Chance Will Make Playoffs