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*Serie D100.0*Average seed
Betim 1 Duque de Caxias 0 +18.0
-3.4
+0.6
Guarani 1 Betim 2 +14.1
-14.7
+0.8
Caxias 2 Vila Nova 1 +1.5
+0.1
Macae 2 CRAC 1 -1.1
-2.1
+0.0
Mogi Mirim 1 Madureira 1 -0.1
-1.7
+0.0
Gremio Barueri 3 Duque de Caxias 2 -3.0
+0.1
Aguia de Maraba 3 Baraunas 1 -1.4
Week of 10/5100.0*Chance in playoffs100.0*Serie D100.0*Average seed
Madureira 1 Betim 1 -14.4
-0.3
Vila Nova 1 Guarani 0 -3.3
No
-0.0
Mogi Mirim 1 Macae 2 +1.6
+0.1
CRAC 0 Duque de Caxias 0 No
Week of 10/12100.0*Chance in playoffs100.0*Serie D100.0*Average seed
Betim 2 Mogi Mirim 1 In
+1.3
Macae 0 Vila Nova 1 -0.3
Guarani 1 CRAC 1 +0.3
Points
Chance Will Make Playoffs