How are these numbers calculated?

Big Games

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

Week of 4/13100.0*Chance wins title100.0*League One100.0*Average seed
Cheltenham Town 1 Gillingham 0 +1.3
-0.2
Rochdale 2 Port Vale 2 -1.0
+0.3
Northampton 0 York 2 +0.5
Burton Albion 1 Plymouth Argyle 0 -0.3
Rotherham 2 Fleetwood Town 1 -0.2
Week of 4/20100.0*Chance wins title100.0*League One100.0*Average seed
Gillingham 2 AFC Wimbledon 2 No
Port Vale 2 Northampton 2 No
+0.2
-0.1
Plymouth Argyle 0 Rotherham 1 -0.9
-0.1
Exeter City 0 Cheltenham Town 1 -0.7
Bradford City 1 Burton Albion 0 +0.6
+0.0
Week of 4/27100.0*Chance wins title100.0*League One100.0*Average seed
Cheltenham Town 0 Bradford City 0 Yes
Wycombe 1 Port Vale 1 Yes
-0.3
Rotherham 2 Aldershot Town 0 -0.2
Points
Chance Will Win Championship