How are these numbers calculated?

Big Games

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

Week of 4/24100.0*Chance wins title100.0*Average seed
Port Vale 2 Notts County 1 -4.0
Hereford 2 Rochdale 1 +3.6
+0.0
Darlington 0 Notts County 5 Yes
Burton 0 Bournemouth 2 -0.1
Week of 5/8None
Points
Chance Will Win Championship