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 -17.6
-0.8
Avi & Natalie 79.72 Kevin & Caitlin 74.56 +3.4
+0.1
Joe & Alice 133.26 Jenn & Shara 112.2 -3.0
-0.1
Justin & Laurel 122.2 Shawn & Erica 108.12 -1.2
Week of 12/1100.0*Chance in playoffs100.0*Average seed
Eric & Melissa 93.26 Justin & Laurel 80.96 +11.6
+0.6
Joe & Alice 126.6 Avi & Natalie 114.84 -6.6
-0.1
Kevin & Caitlin 69.72 Jenn & Shara 125.08 -1.6
+0.1
Rob & Craig 134.34 Shawn & Erica 96.7 -0.9
-0.1
If winner is:HomeAway
Week of 12/8100.0*Chance in playoffs100.0*Average seed
Shawn & Erica vs Kevin & CaitlinOut+4.9
Avi & Natalie vs Rob & Craig+4.9Out
+0.2-0.2
Joe & Alice vs Eric & MelissaOut+4.9
-0.4+0.4

What If

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

100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs12345678Count
71-09.8%10385219,294,652
60-1Out693119,287,284
Total:4.9%519611638,581,936
Games Above .500
Chance Will Make Playoffs