How are these numbers calculated?

Big Games

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

Week of 4/30100.0*Chance wins title100.0*Average seed
Celtic 4 Dundee Utd 1 +17.1
+0.2
Motherwell 0 Rangers 5 -16.5
-0.2
Inverness CT 3 Celtic 2 -16.3
-0.2
Week of 5/7100.0*Chance wins title100.0*Average seed
Rangers 2 Dundee Utd 0 -24.0
-0.2
Rangers 4 Hearts 0 -19.7
-0.2
Kilmarnock 0 Celtic 2 +17.2
+0.2
Hearts 0 Celtic 3 +17.1
+0.2
Week of 5/14100.0*Chance wins title100.0*Average seed
Kilmarnock 1 Rangers 5 No
-0.3
Celtic 4 Motherwell 0 +29.9
+0.3
Points
Chance Will Win Championship