How are these numbers calculated?

Big Games

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

Week of 12/12100.0*Chance in playoffs100.0*Average seed
Green Bay 21 Chicago 13 +5.6
+0.6
Dallas 44 LA Rams 21 +3.9
+0.0
Carolina 24 Seattle 30 -0.1
New Orleans 34 Indianapolis 7 -0.1
Detroit 17 Tampa Bay 38 -0.0
Oakland 16 Jacksonville 20 -0.0
Week of 12/22100.0*Chance in playoffs100.0*Average seed
Minnesota 10 Green Bay 23 +1.1
Seattle 13 Arizona 27 +0.1
San Francisco 34 LA Rams 31 -0.0
Week of 12/29100.0*Chance in playoffs100.0*Average seed
Detroit 20 Green Bay 23 +0.3
Seattle 21 San Francisco 26 -0.2
Carolina 10 New Orleans 42 -0.1
Games Above .500
Chance Will Make Playoffs