How are these numbers calculated?

Big Games

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

Week of 4/20100.0*Chance wins title100.0*Promoted100.0*Average seed
AFC Fylde 0 Stafford 1 No
-1.3
-0.4
Ilkeston FC 0 Hednesford Town 2 No
Marine 1 North Ferriby 3 No
AFC Fylde 3 Frickley 2 +0.9
+0.2
Stocksbridge 0 AFC Fylde 2 +0.5
+0.3
Buxton 2 Rushall Olympic 0 +0.3
Witton Albion 3 Matlock Town 0 -0.2
-0.1
FC United 1 Worksop Town 0 -0.1
-0.1
FC United 3 Ashton United 0 -0.1
Week of 4/27100.0*Chance wins title100.0*Promoted100.0*Average seed
Rushall Olympic 0 FC United 1 +0.1
-0.2
Frickley 0 Witton Albion 2 -0.1
-0.1
Worksop Town 0 AFC Fylde 0 -0.2
AFC Fylde 1 Rushall Olympic 3 -0.4
Week of 5/4100.0*Chance wins title100.0*Promoted100.0*Average seed
AFC Fylde 1 Hednesford Town 2 -0.2
Witton Albion 2 Rushall Olympic 0 -0.2
Points
Chance Will Win Championship