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
AM 59 Grace 65 +4.4
+1.1
Marianna 50 Tyler 48 -0.2
-0.1
Wil 42 Jerry 44 +0.1
+0.0
Tim 72 Ed 17 +0.1
-0.1
Greg 71 Rachel 46 +0.1
Jess 48 Lori 51 -0.1
Week of 11/21100.0*Chance in playoffs100.0*Average seed
Greg 77 Grace 41 -0.9
Marianna 76 Lori 62 In
AM 81 Tyler 54 -0.1
Wil 61 Tom 49 +0.1
If winner is:HomeAway
Week of 11/28100.0*Chance in playoffs100.0*Average seed
Rachel vs Grace-2.1+0.9
AM vs Lori-0.2+0.4
Marianna vs Jerry-0.4+0.1
Wil vs Tim+0.3-0.2
Greg vs Tyler-0.1+0.2
Jess vs Tom+0.1-0.1

What If

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

100100100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-L-Tplayoffs1234567891011121314Count
81-0-0In234328543,730,646
70-1-0In016203728817,986,374
Total:In1631229118261,717,020
Games Above .500
Chance Will Make Playoffs