How are these numbers calculated?

Big Games

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

Week of 11/18100.0*Chance wins title100.0*Average seed
Parana 1 Internacional 0 No
-0.2
Sao Paulo 1 Atletico-PR 1 +0.7
Gremio 3 Santa Cruz 1 -0.1
Week of 11/26100.0*Chance wins title100.0*Average seed
Gremio 3 Flamengo 0 -0.2
Palmeiras 1 Internacional 4 +0.2
Week of 12/2100.0*Chance wins title100.0*Average seed
Fortaleza 1 Gremio 0 +0.5
Internacional 1 Goias 4 -0.2
Points
Chance Will Win Championship