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 +15.0
+0.2
Flamengo 0 Goias 0 -9.6
-0.4
-0.2
Atletico-MG 0 Internacional 1 -0.4
-0.1
-0.1
Atletico-PR 1 Cruzeiro 1 +0.2
+1.1
+0.0
Santo Andre 4 Avai 2 +0.6
Week of 11/29100.0*Chance wins title100.0*Libetadores100.0*Average seed
Corinthians 0 Flamengo 2 +20.0
Yes
+0.7
Goias 4 Sao Paulo 2 +13.2
+0.1
+0.2
Sport Recife 1 Internacional 2 -3.4
-0.9
-0.2
Palmeiras 3 Atletico-MG 1 -3.1
-0.2
Cruzeiro 4 Coritiba 1 -3.0
-0.1
Week of 12/5100.0*Chance wins title100.0*Libetadores100.0*Average seed
Flamengo 2 Gremio 1 Yes
+0.8
Internacional 4 Santo Andre 1 -10.1
-0.3
Botafogo 2 Palmeiras 1 +8.7
+0.3
Sao Paulo 4 Sport Recife 0 -5.6
-0.2
Points
Chance Will Win Championship