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*Promoted100.0*Average seed
Norwich 2 Gillingham 0 No
Leeds 4 Milton Keynes 1 +9.6
+0.3
Millwall 2 Leyton Orient 1 -6.0
-0.1
Wycombe 2 Swindon 2 +1.9
+0.1
Exeter City 1 Charlton 1 +1.0
+0.0
Week of 5/1100.0*Chance wins title100.0*Promoted100.0*Average seed
Tranmere 2 Millwall 0 +22.3
+0.3
Charlton 1 Leeds 0 -17.4
-0.3
Swindon 3 Brentford 2 -0.5
Week of 5/8100.0*Chance wins title100.0*Promoted100.0*Average seed
Leeds 2 Bristol Rovers 1 Yes
+0.5
Oldham 0 Charlton 2 -2.8
-0.2
Millwall 3 Swindon 2 -2.8
-0.0
Points
Chance Will Win Championship