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*Relegated100.0*Average seed
Aldershot 2 Chester 2 -1.6
+0.0
Bournemouth 2 Grimsby 1 +0.8
-0.6
Darlington 1 Brentford 3 +0.1
Macclesfield 2 Barnet 1 +0.1
-0.2
Shrewsbury 0 Lincoln City 0 +0.1
Gillingham 0 Bury 0 +0.1
Bradford 3 Rotherham 0 +0.1
Port Vale 1 Wycombe 1 -0.0
Notts County 0 Dag & Red 3 +0.1
Week of 5/2100.0*Relegated100.0*Average seed
Chester 1 Darlington 2 No
Grimsby 0 Macclesfield 0 No
Points
Chance Will Win Championship