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 +2.8
+0.2
+0.1
Flamengo 0 Goias 0 +0.7
+0.3
+0.1
Atletico-MG 0 Internacional 1 -0.4
-0.8
-0.1
Atletico-PR 1 Cruzeiro 1 +2.5
+0.1
Santo Andre 4 Avai 2 +2.6
+0.1
Week of 11/29100.0*Chance wins title100.0*Libetadores100.0*Average seed
Palmeiras 3 Atletico-MG 1 +7.7
+25.9
+1.0
Goias 4 Sao Paulo 2 +5.5
+0.6
+0.2
Corinthians 0 Flamengo 2 -2.2
-1.4
-0.2
Sport Recife 1 Internacional 2 -1.8
-2.3
-0.2
Cruzeiro 4 Coritiba 1 -6.7
-0.2
Week of 12/5100.0*Chance wins title100.0*Libetadores100.0*Average seed
Botafogo 2 Palmeiras 1 No
-26.5
-1.3
Flamengo 2 Gremio 1 No
-0.3
Internacional 4 Santo Andre 1 No
-0.3
Sao Paulo 4 Sport Recife 0 -1.6
-1.6
-0.2
Santos 1 Cruzeiro 2 -12.8
-0.2
Points
Chance Will Win Championship