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*Chance wins title100.0*Average seed
Roma 0 Milan 0 No
Inter 3 Fiorentina 1 +0.1
+0.1
Lecce 2 Napoli 1 +0.2
Week of 5/22None
Points
Chance Will Win Championship