How are these numbers calculated?

Big Games

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

Week of 4/26100.0*Chance wins title100.0*Average seed
Grimsby 1 Peterborough 4 +8.3
+0.1
Bradford 1 Milton Keynes 2 No
-0.1
Macclesfield 1 Chesterfield 0 +0.1
Mansfield 0 Rotherham 1 +0.1
Chester 0 Stockport 0 +0.1
Barnet 2 Stockport 1 *+0.1
Week of 5/3None

* A starred number could be exactly 0 or just really small. The simulation did not run long enough to know.

Points
Chance Will Win Championship