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
Tom K 52.98 Riley 68.8 +13.5
+1.1
Laurel 94.74 Jenn 97.14 -2.7
-0.1
Shara 71.8 Tom H 63.14 -2.5
-0.1
Ethan 111.1 Shawn 96.48 +2.4
+0.1
Dave 93.34 Eric 88.58 -0.8
-0.1
Justin 117.72 Erica 70.68 +0.3
If winner is:HomeAway
Week of 11/24100.0*Chance in playoffs100.0*Average seed
Laurel vs Riley-19.7+19.7
-1.0+1.0
Jenn vs Eric-3.8+3.8
-0.1+0.1
Erica vs Ethan-2.5+2.5
-0.2+0.2
Justin vs Tom K-2.3+2.3
-0.1+0.1
Shara vs Shawn-0.9+0.9
Dave vs Tom H-0.9+0.9
-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
72-082.8%417323014304,178,899
61-15.30521403148,354,535
50-2Out043153124,179,702
Total:23.4%1481014222315316,713,136
Games Above .500
Chance Will Make Playoffs