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
Portuguesa 2 Ceara 4 +22.4
-1.2
Guarani 1 America-RN 2 -2.7
+0.2
Sao Raimundo-AM 3 Santo Andre 2 +2.5
-0.2
CRB 3 Ituano 4 -2.2
+0.1
Vila Nova 2 Paysandu 1 +1.2
Gama 3 Marilia 0 +0.1
Week of 11/18100.0*Serie C100.0*Average seed
Portuguesa 2 Vila Nova 0 -23.9
+1.3
Paulista 9 Paysandu 0 -4.4
+0.2
Remo 3 Sao Raimundo-AM 0 -1.8
+0.1
Guarani 2 Sport Recife 0 +1.5
-0.2
Avai 1 CRB 2 +1.0
-0.2
Ceara 0 Atletico-MG 1 -0.3
Week of 11/25100.0*Serie C100.0*Average seed
Sport Recife 2 Portuguesa 3 No
+1.8
Sao Raimundo-AM 2 Gama 0 +8.3
-0.4
Paysandu 4 Marilia 1 +8.3
-0.3
CRB 2 Remo 1 +8.3
-0.3
Vila Nova 1 Guarani 5 +1.1
Ituano 4 Ceara 1 +0.2
Points
Chance Will Win Championship