How are these numbers calculated?

Big Games

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

Week of 11/19100.0*Chance wins title100.0*Average seed
Corinthians 1 Internacional 1 -7.6
-0.1
Juventude 2 Goias 1 +0.5
+0.1
Week of 11/27100.0*Chance wins title100.0*Average seed
Internacional 2 Palmeiras 1 +13.7
+0.2
Corinthians 3 Ponte Preta 1 -10.1
-0.1
Week of 12/4100.0*Chance wins title100.0*Average seed
Goias 3 Corinthians 2 +19.3
+0.2
Coritiba 1 Internacional 0 No
-0.1
Points
Chance Will Win Championship