How are these numbers calculated?

Big Games

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

Week of 5/10100.0*Average seed
Werder Bremen 6 Hannover 96 1 -0.2
VfL Wolfsburg 4 VfB Stuttgart 0 -0.1
Hansa Rostock 1 Leverkusen 2 -0.1
Karlsruher 1 VfL Bochum 3 +0.1
Schalke 1 Eintracht 0 +0.0
Week of 5/17100.0*Average seed
Hannover 96 4 Energie Cottbus 0 +0.1
Hamburger SV 7 Karlsruher 0 +0.0
Points
Chance Will Win Championship