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
Sao Raimundo-AM 3 Santo Andre 2 -16.2
+1.1
CRB 3 Ituano 4 -1.7
+0.1
Guarani 1 America-RN 2 -1.7
+0.2
Vila Nova 2 Paysandu 1 +1.2
-0.1
Portuguesa 2 Ceara 4 -0.2
+0.1
Week of 11/18100.0*Serie C100.0*Average seed
Remo 3 Sao Raimundo-AM 0 +20.4
-1.0
Paulista 9 Paysandu 0 -7.8
+0.2
Guarani 2 Sport Recife 0 +4.7
-0.3
Avai 1 CRB 2 +4.2
-0.2
Portuguesa 2 Vila Nova 0 -1.6
-0.1
Week of 11/25100.0*Serie C100.0*Average seed
Sao Raimundo-AM 2 Gama 0 -24.4
+2.0
Sport Recife 2 Portuguesa 3 +9.8
-0.2
Paysandu 4 Marilia 1 +9.7
-0.2
CRB 2 Remo 1 +9.7
-0.2
Vila Nova 1 Guarani 5 +4.4
-0.1
Points
Chance Will Win Championship