How are these numbers calculated?

Big Games

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

Week of 5/17100.0*Chance wins title100.0*Average seed
St. Mirren 0 Rangers 3 +11.4
+0.1
Dundee Utd 0 Celtic 1 -11.0
-0.1
Aberdeen 2 Rangers 0 -9.5
-0.1
Rangers 1 Motherwell 1 -2.9
-0.0
Points
Chance Will Win Championship