How are these numbers calculated?

Big Games

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

Week of 11/23100.0*Libertadores100.0*Average seed
Atletico-MG 4 Goias 1 -15.5
-0.5
Atletico-PR 6 Nautico 1 -7.2
-0.2
Sao Paulo 1 Botafogo 1 +2.4
+0.1
Criciuma 1 Vitoria 1 +1.4
+0.0
Ponte Preta 1 Gremio 1 +1.0
+0.1
Week of 11/30100.0*Libertadores100.0*Average seed
Gremio 1 Goias 0 -26.3
-0.9
Coritiba 2 Botafogo 1 +13.0
+0.2
Vitoria 4 Flamengo 2 -2.8
-0.1
Santos 2 Atletico-PR 1 +1.8
+0.2
Fluminense 2 Atletico-MG 2 +1.1
+0.0
Week of 12/7100.0*Libertadores100.0*Average seed
Goias 0 Santos 3 -47.4
-1.0
Botafogo 3 Criciuma 0 -11.3
-0.3
Atletico-MG 2 Vitoria 2 +6.5
+0.1
Atletico-PR 5 Vasco da Gama 1 -0.2
Points
Chance Will Win Championship