How are these numbers calculated?

Big Games

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

Week of 5/11100.0*Average seed
Inter Milan 2 AC Siena 2 +0.4
Genoa 0 Lazio 2 -0.3
Udinese 0 Cagliari Calcio 2 -0.2
Palermo 0 Sampdoria 2 +0.1
AS Roma 2 Atalanta BC 1 +0.1
Livorno 0 Torino 1 -0.1
Week of 5/17100.0*Average seed
AC Siena 2 Palermo 2 -0.7
Lazio 2 Napoli 1 -0.2
Atalanta BC 2 Genoa 0 -0.1
Cagliari Calcio 2 Reggina Calcio 2 +0.1
Points
Chance Will Win Championship