How are these numbers calculated?

Big Games

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

Week of 12/4100.0*Chance wins title100.0*Libertadores100.0*Average seed
Atletico-PR 5 Sao Caetano 2 No
-8.7
-0.5
Santos 5 Gremio 1 -1.9
-0.1
Vitoria 1 Sao Paulo 4 -1.3
-0.6
-0.2
Goias 0 Palmeiras 0 +3.3
+0.0
Week of 12/11100.0*Chance wins title100.0*Libertadores100.0*Average seed
Sao Caetano 0 Santos 3 -28.9
-0.4
Palmeiras 3 Criciuma 2 -19.4
-0.2
Sao Paulo 1 Flamengo 1 +0.0
Week of 12/19100.0*Chance wins title100.0*Libertadores100.0*Average seed
Atletico-MG 3 Sao Caetano 0 -1.3
Internacional 2 Parana 1 +0.3
Juventude 1 Paysandu 2 -0.3
Santos 2 Vasco da Gama 1 +0.3
Points
Chance Will Win Championship