How are these numbers calculated?

Big Games

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

Week of 1/31100.0*Chance in playoffs100.0*Average seed
Madison 2 Independence/Rock Ridge 5 Out
-1.6
McLean 5 Briar Woods 8 +4.0
+0.1
Patriot 10 Battlefield 7 -3.7
-0.1
Loudoun County/John Champe 6 Flint Hill 13 -3.0
-0.2
Kettle Run/Liberty 2 Loudoun Valley/Woodgrove 3 +2.8
+0.1
Week of 2/7100.0*Chance in playoffs100.0*Average seed
Chantilly 6 Freedom 3 +0.5
If winner is:HomeTieAway
Week of 2/14100.0*Chance in playoffs100.0*Average seed
Oakton vs Riverside-0.5+0.5+0.5

What If

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

100100100100100100100100100100100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TPW-L-Tplayoffs12345678910111213141516171819202122Count
70-0-0Out5248199,371,848
Total:Out5248199,371,848
Games Above .500
Chance Will Make Playoffs