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 C100.0*Average seed
Icasa 2 Paysandu 1 +12.8
-0.4
ABC 4 ASA 1 +6.6
-0.1
Guaratingueta 0 Ceara 1 -3.7
+0.1
America-MG 3 Atletico-GO 0 -2.8
+0.1
Avai 0 America-RN 1 +2.6
-0.1
Chapecoense 1 Bragantino 1 +1.2
-0.0
Week of 11/22100.0*Serie C100.0*Average seed
Paysandu 0 Bragantino 1 +16.3
-0.7
Guaratingueta 3 Parana 4 -12.4
+0.2
Oeste 2 Atletico-GO 4 +7.6
-0.3
ABC 1 Avai 0 +2.0
-0.1
Sao Caetano 2 America-RN 2 +0.0
Week of 11/29100.0*Serie C100.0*Average seed
Atletico-GO 2 Guaratingueta 0 Yes
Sport Recife 0 Paysandu 0 Yes
-0.1
ASA 1 Sao Caetano 0 +0.1
Points
Chance Will Win Championship