How are these numbers calculated?

Big Games

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

Week of 11/9100.0*Chance wins title
Avai 0 Fortaleza 1 Yes
CSA 0 Atletico-GO 0 +1.2
Coritiba 1 Goias 0 +0.8
Week of 11/16None
Week of 11/23None
Chance Will Win Championship