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
Eric 95.94 Tom K 95.72 +0.9
+0.4
Jenn 121.52 Dave 114.46 +0.9
+0.1
Erica 73.98 Shawn 61.7 +0.2
Justin 73 Riley 130.16 -0.1
Week of 11/24100.0*Chance in playoffs100.0*Average seed
Eric 74.36 Shawn 103.94 -47.9
-3.3
Dave 58.5 Riley 106.56 +2.1
Erica 104.54 Tom H 64.7 -0.1
Jenn 100.28 Tom K 107.62 -0.1
If winner is:HomeAway
Week of 12/1100.0*Chance in playoffs100.0*Average seed
Dave vs Shawn+8.4Out
+0.5-0.5
Eric vs Ethan+8.4Out
+1.4-1.4
Jenn vs Riley+0.2-0.2
Erica vs Shara-0.1+0.1

What If

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

100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs123456789101112Count
51-016.7%173028255,142,942
40-1Out17835,138,202
Total:8.4%81514214210,281,144
Games Above .500
Chance Will Make Playoffs