How are these numbers calculated?

Big Games

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

Week of 11/14100.0*Serie A100.0*Average seed
Ceara 2 Santo Andre 3 +1.8
+0.3
Corinthians 3 Vila Nova 1 Yes
Bragantino 3 Avai 2 +0.1
Week of 11/21100.0*Serie A100.0*Average seed
Criciuma 4 Santo Andre 4 -0.2
Corinthians 3 Avai 2 +0.1
Gremio Barueri 3 America-RN 0 -0.0
Week of 11/28100.0*Serie A100.0*Average seed
Avai 2 Sao Caetano 2 +0.5
Santo Andre 3 Parana 1 +0.3
Points
Chance Will Win Championship