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*Promoted100.0*Average seed
Barnet 2 Stockport 1 -7.0
-0.4
Brentford 0 Hereford 3 -6.8
-0.1
Chester 0 Stockport 0 -4.7
-0.0
Bury 1 Rochdale 1 +0.6
+0.0
Darlington 2 Dag & Red 3 +0.1
Notts County 1 Wycombe 0 +0.1
Week of 5/3100.0*Promoted100.0*Average seed
Rochdale 1 Shrewsbury 1 +0.3
Stockport 1 Brentford 0 +0.1
Points
Chance Will Win Championship