How are these numbers calculated?

Big Games

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

Week of 4/14100.0*Chance wins title100.0*Promoted100.0*Average seed
Montrose 1 Berwick 0 +10.5
+7.9
+0.1
Peterhead 1 Cowdenbeath 0 -8.5
-6.4
-0.1
Week of 4/24None
Week of 4/28100.0*Chance wins title100.0*Promoted100.0*Average seed
Montrose 1 Elgin City 1 Yes
Yes
+0.1
Peterhead 2 Edinburgh City 1 -8.4
-6.3
-0.1
Points
Chance Will Win Championship