How are these numbers calculated?

Big Games

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

Week of 8/14100.0*Chance in playoffs100.0*Home Advantage100.0*Average seed
West Auckland 6 Canterbury 5 Out
No
-0.5
West Auckland 8 Canterbury 7 (ot)-24.8
-8.7
-0.4
Southern 2 Dunedin 13 +0.1
Week of 8/21100.0*Chance in playoffs100.0*Home Advantage100.0*Average seed
Canterbury 9 Dunedin 1 +0.2
Points
Chance Will Make Playoffs