How are these numbers calculated?

Big Games

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

Week of 4/25100.0*Chance wins title100.0*Promoted100.0*Average seed
Darlington 1 Brentford 3 +22.7
Yes
+0.3
Port Vale 1 Wycombe 1 +12.8
+0.1
Gillingham 0 Bury 0 +0.4
Yes
Exeter City 2 Morecambe 2 +0.4
+0.2
Shrewsbury 0 Lincoln City 0 -0.3
Accrington 1 Chesterfield 0 -0.3
Notts County 0 Dag & Red 3 -0.3
Luton 1 Rochdale 1 -0.3
Bradford 3 Rotherham 0 -0.3
Bournemouth 2 Grimsby 1 -0.2
Week of 5/2None
Points
Chance Will Win Championship