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*Average seed
Bragantino 3 Avai 2 -0.1
Ceara 2 Santo Andre 3 -0.1
Week of 11/21100.0*Average seed
Criciuma 4 Santo Andre 4 +0.2
Corinthians 3 Avai 2 -0.1
Week of 11/28100.0*Average seed
Avai 2 Sao Caetano 2 -0.5
Santo Andre 3 Parana 1 -0.2
Juventude 3 Gremio Barueri 2 +0.1
Points
Chance Will Win Championship