How are these numbers calculated?

Big Games

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

Week of 11/9100.0*Serie C**100.0*Average seed
Guaratingueta 1 Vitoria 0 -18.5
+0.6
Bragantino 1 Joinville 0 +13.8
-0.2
Ceara 1 CRB 2 +2.5
-0.2
Avai 1 Guarani 0 -0.3
Parana 2 Ipatinga 0 -0.1
+0.1
Week of 11/17100.0*Serie C**100.0*Average seed
Ipatinga 2 Guaratingueta 3 -28.3
+0.6
Ceara 1 Bragantino 2 +17.4
-0.2
CRB 2 Guarani 1 +5.3
-0.2
Boa Esporte 0 ABC 0 +0.5
Week of 11/23100.0*Serie C**100.0*Average seed
Guaratingueta 2 Barueri 1 -43.5
+0.8
Guarani 1 Sao Caetano 2 -14.1
+0.3
Bragantino 3 Boa Esporte 0 +13.7
-0.3
ASA 2 CRB 4 +8.0
-0.4
Points
Chance Will Win Championship