How are these numbers calculated?

Big Games

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

Week of 11/21100.0*Chance wins title100.0*Libetadores100.0*Average seed
Botafogo 3 Sao Paulo 2 -21.2
-0.6
-0.4
Flamengo 0 Goias 0 +8.2
+0.1
Atletico-MG 0 Internacional 1 -0.6
Atletico-PR 1 Cruzeiro 1 +0.1
+0.1
Week of 11/29100.0*Chance wins title100.0*Libetadores100.0*Average seed
Goias 4 Sao Paulo 2 -31.7
-1.4
-0.6
Corinthians 0 Flamengo 2 -13.1
-0.1
-0.2
Sport Recife 1 Internacional 2 -4.4
-0.2
-0.1
Palmeiras 3 Atletico-MG 1 -4.0
-0.1
Cruzeiro 4 Coritiba 1 -0.5
Week of 12/5100.0*Chance wins title100.0*Libetadores100.0*Average seed
Flamengo 2 Gremio 1 No
-0.2
Internacional 4 Santo Andre 1 No
-0.3
Sao Paulo 4 Sport Recife 0 +7.2
Yes
+0.7
Botafogo 2 Palmeiras 1 +3.7
+1.3
+0.4
Santos 1 Cruzeiro 2 -10.3
-0.1
Points
Chance Will Win Championship