How are these numbers calculated?

Big Games

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

Week of 9/28100.0*Chance in playoffs100.0*Average seed
Caxias 2 Vila Nova 1 +7.7
+0.7
Guarani 1 Betim 2 +1.9
+0.1
Macae 2 CRAC 1 -0.9
-0.1
Gremio Barueri 3 Duque de Caxias 2 +0.1
Mogi Mirim 1 Madureira 1 +0.1
+0.1
Betim 1 Duque de Caxias 0 -0.1
Week of 10/5100.0*Chance in playoffs100.0*Average seed
Madureira 1 Betim 1 In
Mogi Mirim 1 Macae 2 In
-0.1
Caxias 1 Gremio Barueri 1 In
-0.3
Week of 10/12100.0*Chance in playoffs100.0*Average seed
Duque de Caxias 1 Caxias 0 -0.6
Betim 2 Mogi Mirim 1 +0.2
Macae 0 Vila Nova 1 +0.2
Points
Chance Will Make Playoffs