How are these numbers calculated?

Big Games

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

Week of 11/15100.0*Chance wins title
Chapecoense 1 Bragantino 1 Yes
Palmeiras 3 Boa Esporte 0 Yes
Week of 11/22None
Week of 11/29None
Points
Chance Will Win Championship