How are these numbers calculated?

Big Games

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

Week of 11/17100.0*Chance in playoffs100.0*Average seed
Justin 73 Riley 130.16 +1.5
+0.5
Eric 95.94 Tom K 95.72 +1.4
Week of 11/24100.0*Chance in playoffs100.0*Average seed
Jenn 100.28 Tom K 107.62 -19.3
-1.2
Dave 58.5 Riley 106.56 +5.8
+1.1
Eric 74.36 Shawn 103.94 -0.1
Erica 104.54 Tom H 64.7 -0.1
If winner is:HomeAway
Week of 12/1100.0*Chance in playoffs100.0*Average seed
Justin vs Tom K+24.2Out
+1.5-1.5
Jenn vs RileyOut+24.2
-1.7+1.7
Eric vs Ethan-0.2+0.2

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
61-048.5%48525,142,639
50-1Out642885,138,505
Total:24.2%245814410,281,144
Games Above .500
Chance Will Make Playoffs