How are these numbers calculated?

Big Games

How we did last week and who we should root for this week.   Explain

Week of 3/3100.0*Chance in playoffs100.0*Average seed
Bangu 1 Portuguesa 1 +3.0
+0.1
Flamengo 1 Botafogo 0 +0.7
-0.0
Week of 3/7100.0*Chance in playoffs100.0*Average seed
Fluminense 2 Nova Iguacu 1 In
+0.8
Vasco da Gama 0 Fluminense 0 +3.2
-0.1
Portuguesa 2 Nova Iguacu 1 -3.2
-0.1
Portuguesa 1 Cabofriense 2 +2.6
+0.1
Boavista 0 Flamengo 3 +1.9
-0.0
Volta Redonda 1 Botafogo 1 +0.1
+0.0
Week of 3/17100.0*Chance in playoffs100.0*Average seed
Flamengo 4 Portuguesa 0 -0.2
Botafogo 2 Vasco da Gama 3 +0.1
Cabofriense 1 Fluminense 1 -0.1
Points
Chance Will Make Playoffs