How are these numbers calculated?

Big Games

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

Week of 11/11100.0*Serie C100.0*Average seed
Vila Nova 2 Paysandu 1 +16.6
-1.0
CRB 3 Ituano 4 -4.3
+0.1
Guarani 1 America-RN 2 -2.2
+0.1
Sao Raimundo-AM 3 Santo Andre 2 +2.0
-0.1
Portuguesa 2 Ceara 4 -1.6
-0.1
Gama 3 Marilia 0 -0.0
Week of 11/18100.0*Serie C100.0*Average seed
Paulista 9 Paysandu 0 +13.8
-0.6
Avai 1 CRB 2 +11.4
-0.3
Remo 3 Sao Raimundo-AM 0 -3.1
-0.0
Guarani 2 Sport Recife 0 +1.9
-0.1
Portuguesa 2 Vila Nova 0 +1.3
Ceara 0 Atletico-MG 1 -0.1
+0.1
Week of 11/25100.0*Serie C100.0*Average seed
Paysandu 4 Marilia 1 -37.8
+1.3
Sport Recife 2 Portuguesa 3 +20.7
-0.5
CRB 2 Remo 1 +13.1
-0.3
Vila Nova 1 Guarani 5 -9.3
-0.1
Sao Raimundo-AM 2 Gama 0 +2.0
-0.3
Points
Chance Will Win Championship