How are these numbers calculated?

Big Games

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

Week of 4/21100.0*Chance wins title
MK Dons 1 Sheff United 0 +1.1
Charlton 2 Wycombe 1 +1.0
Week of 4/28None
Week of 5/5None
Points
Chance Will Win Championship