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
Patriot 10 Battlefield 7 -5.3
Madison 2 Independence/Rock Ridge 5 Out
McLean 5 Briar Woods 8 +3.6
Loudoun County/John Champe 6 Flint Hill 13 -2.2
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

If finish:Chance inChance will finish regular season at seed
Games Above .500
Chance Will Make Playoffs