How are these numbers calculated?

Big Games

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

Week of 11/24100.0*Chance in playoffs100.0*Average seed
Joe & Alice 133.26 Jenn & Shara 112.2 -9.6
-0.8
Avi & Natalie 79.72 Kevin & Caitlin 74.56 +2.1
+0.1
Eric & Melissa 114.18 Rob & Craig 122.34 -0.8
Justin & Laurel 122.2 Shawn & Erica 108.12 +0.1
Week of 12/1100.0*Chance in playoffs100.0*Average seed
Kevin & Caitlin 69.72 Jenn & Shara 125.08 +12.9
+0.5
Rob & Craig 134.34 Shawn & Erica 96.7 -7.8
Joe & Alice 126.6 Avi & Natalie 114.84 -1.1
-0.1
Eric & Melissa 93.26 Justin & Laurel 80.96 -0.8
+0.1
If winner is:HomeAway
Week of 12/8100.0*Chance in playoffs100.0*Average seed
Justin & Laurel vs Jenn & Shara-10.2In
-1.3+1.3
Shawn & Erica vs Kevin & Caitlin-6.0In
-0.1+0.3
Avi & Natalie vs Rob & CraigIn-3.2
+0.2-0.1
Joe & Alice vs Eric & Melissa-3.0+5.1
-0.2+0.3

What If

Chances based on how well the Jenn & Shara finish out the regular season.   Explain

100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs12345678Count
91-0In792157,875,143
80-179.5%931392057,870,665
Total:89.8%4015162010115,745,808
Games Above .500
Chance Will Make Playoffs