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
Eric & Melissa 114.18 Rob & Craig 122.34 +16.0
+0.7
Joe & Alice 133.26 Jenn & Shara 112.2 -4.0
-0.1
Avi & Natalie 79.72 Kevin & Caitlin 74.56 +2.6
+0.2
Justin & Laurel 122.2 Shawn & Erica 108.12 -0.4
Week of 12/1100.0*Chance in playoffs100.0*Average seed
Rob & Craig 134.34 Shawn & Erica 96.7 +32.5
+0.8
Kevin & Caitlin 69.72 Jenn & Shara 125.08 -6.1
-0.1
Joe & Alice 126.6 Avi & Natalie 114.84 -3.0
-0.1
Eric & Melissa 93.26 Justin & Laurel 80.96 -0.6
-0.1
If winner is:HomeAway
Week of 12/8100.0*Chance in playoffs100.0*Average seed
Avi & Natalie vs Rob & Craig-58.1+18.4
-1.2+0.4
Shawn & Erica vs Kevin & Caitlin-8.5+14.7
-0.2+0.4
Joe & Alice vs Eric & Melissa-2.7+4.6
-0.2+0.3
Justin & Laurel vs Jenn & Shara-1.7+1.7

What If

Chances based on how well the Rob & Craig finish out the regular season.   Explain

100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs12345678Count
81-085.8%1540321487,937,585
70-19.39741727,808,223
Total:67.4%113026294115,745,808
Games Above .500
Chance Will Make Playoffs