How are these numbers calculated?

Big Games

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

Week of 10/27100.0*Chance in playoffs100.0*Average seed
Jenn 67.44 Tom K 81.56 -6.8
-0.4
Eric 103.2 Riley 97.62 -4.3
-0.6
Erica 86.48 Ethan 114.9 +1.2
Laurel 76.62 Shara 108.42 -0.6
Justin 104.98 Dave 100.98 -0.3
If winner is:HomeAway
Week of 11/3100.0*Chance in playoffs100.0*Average seed
Shawn vs Riley-4.8+4.8
-0.7+0.7
Laurel vs Tom K+2.7-2.7
+0.1-0.1
Justin vs Shara+0.6-0.6
Jenn vs Eric-0.4+0.4
Tom H vs Ethan-0.2+0.2
Erica vs Dave+0.1-0.1

What If

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

100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs123456789101112Count
85-098.8%013793131172,346
74-176.0052160820400852,047
63-240.2152401202712101,704,652
52-321.021901112929901,702,495
41-410.01002245014853,418
30-5Out04851172,186
Total:35.7%00161802101213131245,457,144
Games Above .500
Chance Will Make Playoffs