How are these numbers calculated?

Big Games

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

Week of 4/20100.0*Chance wins title100.0*Promoted
Ross County 4 Queen of the South 0 No
-0.3
Inverness CT 0 Dundee Utd 2 +0.3
+0.2
Week of 4/27None
Week of 5/4None
Points
Chance Will Win Championship