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 -17.5
+0.5
Week of 5/24100.0*Serie B100.0*Average seed
Flamengo 3 Goias 1 -4.8
+0.1
Nautico 1 Vasco da Gama 1 -3.4
+0.1
Bahia 0 Santos 2 -3.2
+0.1
Cruzeiro 1 Portuguesa 1 -3.1
+0.1
Week of 5/31100.0*Serie B100.0*Average seed
Atletico-MG 0 Paysandu 0 +20.0
-0.5
Bragantino 0 Bahia 0 +5.7
+0.1
Sao Paulo 2 Nautico 0 -3.5
+0.3
Goias 1 Portuguesa 1 +0.3
Games Above .500
Chance Will Make Playoffs