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 -21.7
+0.7
Week of 5/24100.0*Serie B100.0*Average seed
Bahia 0 Santos 2 -4.8
+0.1
Flamengo 3 Goias 1 -1.8
+0.1
Nautico 1 Vasco da Gama 1 -1.2
+0.0
Cruzeiro 1 Portuguesa 1 +1.0
Week of 5/31100.0*Serie B100.0*Average seed
Bragantino 0 Bahia 0 +10.4
-0.1
Atletico-MG 0 Paysandu 0 -5.0
-0.1
Sao Paulo 2 Nautico 0 -3.3
+0.3
Goias 1 Portuguesa 1 +0.2
Games Above .500
Chance Will Make Playoffs