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
Dave 93.34 Eric 88.58 +7.8
+1.2
Laurel 94.74 Jenn 97.14 -0.3
Ethan 111.1 Shawn 96.48 +0.1
Shara 71.8 Tom H 63.14 -0.1
+0.0
Tom K 52.98 Riley 68.8 -0.1
If winner is:HomeAway
Week of 11/24100.0*Chance in playoffs100.0*Average seed
Dave vs Tom H+3.1Out
+0.4-0.8
Shara vs Shawn-2.0+2.7
+0.1-0.1
Laurel vs Riley+1.5-2.8
+0.1-0.3
Justin vs Tom K-1.2+3.0
Jenn vs Eric-2.6+0.9
-0.1+0.0
Erica vs Ethan-0.5+0.2
-0.1+0.0

What If

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

100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs123456789101112Count
62-022.2%22050226114,267,460
51-1Out1144143026,413,778
40-2Out861319,458,170
Total:6.3%16151323393050,139,408
Games Above .500
Chance Will Make Playoffs