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
Kettle Run/Liberty 2 Loudoun Valley/Woodgrove 3 +5.4
+0.2
Patriot 10 Battlefield 7 -5.3
-0.3
Madison 2 Independence/Rock Ridge 5 Out
-1.6
McLean 5 Briar Woods 8 +3.6
+0.1
Loudoun County/John Champe 6 Flint Hill 13 -2.2
-0.1
Week of 2/7100.0*Chance in playoffs100.0*Average seed
Chantilly 6 Freedom 3 +0.0
If winner is:HomeTieAway
Week of 2/14100.0*Chance in playoffs100.0*Average seed
Oakton vs Riverside-0.9+0.1+0.1

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
70-0-0Out8812608,406,760
Total:Out8812608,406,760
Games Above .500
Chance Will Make Playoffs