How are these numbers calculated?

Big Games

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

Week of 11/15100.0*Serie A100.0*Average seed
Sao Caetano 3 Joinville 2 -5.2
-0.9
Icasa 2 Paysandu 1 -2.6
-0.1
Sport Recife 2 Parana 0 -1.9
+0.0
Guaratingueta 0 Ceara 1 -1.5
-0.1
Oeste 2 Figueirense 2 +0.2
Avai 0 America-RN 1 +0.2
+0.2
America-MG 3 Atletico-GO 0 -0.2
Palmeiras 3 Boa Esporte 0 +0.1
Week of 11/22100.0*Serie A100.0*Average seed
Joinville 2 America-MG 1 +1.1
Palmeiras 4 Ceara 1 +0.2
ABC 1 Avai 0 +0.2
Guaratingueta 3 Parana 4 -0.1
Figueirense 2 ASA 0 -0.1
Week of 11/29100.0*Serie A100.0*Average seed
Ceara 0 Joinville 3 +1.3
Parana 2 Icasa 0 -0.4
Avai 1 Boa Esporte 0 -0.1
America-MG 0 ABC 0 -0.0
Points
Chance Will Win Championship