How are these numbers calculated?

Big Games

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

Week of 4/2100.0*Chance in playoffs100.0*Average seed
Duque de Caxias 0 Flamengo 2 +22.1
+1.0
Vasco da Gama 4 Bangu 0 -8.2
-0.2
Macae 2 Boavista 1 +4.3
+0.1
Americano 0 Olaria 0 +2.9
+0.1
Volta Redonda 1 Fluminense 2 +1.6
+0.1
Botafogo 1 Resende 1 +1.1
+0.0
Nova Iguacu 3 Cabofriense 2 -0.1
Madureira 2 America 0 +0.0
Week of 4/10100.0*Chance in playoffs100.0*Average seed
Botafogo 0 Flamengo 2 +28.0
+0.6
Americano 1 Fluminense 5 +15.5
+0.2
Duque de Caxias 2 Resende 1 +0.9
+0.0
Week of 4/17100.0*Chance in playoffs100.0*Average seed
Flamengo 1 Macae 1 -0.2
Olaria 2 Vasco da Gama 2 +0.1
Points
Chance Will Make Playoffs