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
Atletico-MG 0 Internacional 1 +3.0
+31.9
+1.1
Botafogo 3 Sao Paulo 2 +1.7
Flamengo 0 Goias 0 +0.4
-0.2
+0.0
Atletico-PR 1 Cruzeiro 1 +3.5
+0.1
Santo Andre 4 Avai 2 +1.5
+0.1
Week of 11/29100.0*Chance wins title100.0*Libetadores100.0*Average seed
Sport Recife 1 Internacional 2 +14.6
+12.5
+0.9
Goias 4 Sao Paulo 2 +7.2
+0.1
+0.2
Corinthians 0 Flamengo 2 -5.0
-0.2
-0.2
Palmeiras 3 Atletico-MG 1 -0.9
+1.9
-0.1
Cruzeiro 4 Coritiba 1 -7.6
-0.1
Week of 12/5100.0*Chance wins title100.0*Libetadores100.0*Average seed
Internacional 4 Santo Andre 1 +41.0
Yes
+1.1
Flamengo 2 Gremio 1 No
-0.2
Santos 1 Cruzeiro 2 -2.9
-0.1
Botafogo 2 Palmeiras 1 Yes
+0.3
Sao Paulo 4 Sport Recife 0 -0.9
-0.3
Points
Chance Will Win Championship