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 +1.2
+0.1
Flamengo 1 Botafogo 0 +0.6
Week of 3/7100.0*Chance in playoffs100.0*Average seed
Portuguesa 1 Cabofriense 2 +17.8
+0.3
Vasco da Gama 0 Fluminense 0 -4.3
-0.1
Boavista 0 Flamengo 3 +3.6
+0.1
Portuguesa 2 Nova Iguacu 1 -2.4
-0.1
Volta Redonda 1 Botafogo 1 +2.3
+0.2
Fluminense 2 Nova Iguacu 1 -0.5
-0.0
Week of 3/17100.0*Chance in playoffs100.0*Average seed
Botafogo 2 Vasco da Gama 3 In
+1.2
Flamengo 4 Portuguesa 0 +8.5
+0.2
Points
Chance Will Make Playoffs