How are these numbers calculated?

Big Games

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

Week of 5/8100.0*Average seed
Norwich City LFC 0 Crystal Palace 3 +0.1
Week of 5/15100.0*Average seed
Enfield Town LFC 3 Ipswich Town LFC 4 -0.2
Norwich City LFC 0 Gillingham 8 +0.1
Week of 5/22100.0*Average seed
Norwich City LFC 5 Old Actonians 1 -0.0
Chance Will Win Championship