Detroit Lions Playoff Chances 2014 50/50

Lost to Green Bay 20-30, average seed down 2.1 to 6
11-0-5   .688

How are these numbers calculated?

Big Games

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

Week of 12/11100.0*Chance in playoffs100.0*Average seed
Detroit 16 Minnesota 14 +11.4
+0.7
Seattle 17 San Francisco 7 +0.9
-0.1
Buffalo 21 Green Bay 13 +0.8
+0.4
St. Louis 6 Arizona 12 +0.3
Week of 12/18100.0*Chance in playoffs100.0*Average seed
Washington 27 Philadelphia 24 In
Week of 12/28100.0*Chance in playoffs100.0*Average seed
Green Bay 30 Detroit 20 -2.1
Seattle 20 St. Louis 6 -0.1
San Francisco 20 Arizona 17 +0.1
Games Above .500
Chance Will Make Playoffs