How are these numbers calculated?

Big Games

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

Week of 11/13100.0*Chance in playoffs100.0*Average seed
Chris 127.42 Nana 180.34 +8.5
+1.0
Bobby 142.28 Chuck 132.94 -1.1
-0.1
John 154.1 Roger 134.58 -1.0
Steve 99.14 Nick 116.44 +0.2
Andy 94.74 Evan 82.96 -0.1
Week of 11/20100.0*Chance in playoffs100.0*Average seed
Nana 112.14 Roger 81.58 +12.4
+1.1
Evan 143.84 Steve 75.88 +0.3
Nick 105 John 141.3 +0.1
Week of 11/27100.0*Chance in playoffs100.0*Average seed
Bobby 125.44 Nana 115.06 -0.5
Chris 102.76 Ryan 137 -0.2
John 122.74 Evan 127.94 +0.1
If winner is:HomeAway
Nana vs Nick+0.9-0.9
Andy vs Chris-0.2+0.2
Bobby vs Ryan+0.1-0.1

What If

Chances based on how well the Nana finish out the regular season.   Explain

100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs123456789101112Count
91-0In742610,927,671
80-1In6213728810,931,073
Total:In40231914421,858,744
Games Above .500
Chance Will Make Playoffs