How are these numbers calculated?

Big Games

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

Week of 11/14100.0*Chance in playoffs100.0*Average seed
Drew 47 Tom 48 -20.9
-1.7
Wil 42 Jerry 44 +2.2
+0.2
Tim 72 Ed 17 +1.3
Marianna 50 Tyler 48 -1.1
-0.1
Greg 71 Rachel 46 -0.7
AM 59 Grace 65 -0.1
Week of 11/21100.0*Chance in playoffs100.0*Average seed
Greg 77 Grace 41 -4.0
-0.1
AM 81 Tyler 54 -3.2
-0.1
Jess 56 Jerry 49 -3.0
-0.2
Wil 61 Tom 49 -1.4
Marianna 76 Lori 62 +1.3
Rachel 57 Ed 83 +0.1
If winner is:HomeAway
Week of 11/28100.0*Chance in playoffs100.0*Average seed
Drew vs Ed+42.0Out
+1.7-1.7
Jess vs Tom+8.0-8.0
Wil vs Tim-8.0+8.0
-0.2+0.3
Greg vs Tyler-4.5+4.5
-0.2+0.2
AM vs Lori+0.2-0.2

What If

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

100100100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-L-Tplayoffs1234567891011121314Count
6.51-0-084.0%934411610,929,744
5.50-1-0Out25502510,928,980
Total:42.0%41721813251221,858,724
Games Above .500
Chance Will Make Playoffs