How are these numbers calculated?

Big Games

How we did yesterday and who we should root for today.   Explain

Friday100.0*Chance in playoffs100.0*Average seed
Potomac 5 Salem 4 +0.1
+0.2
Potomac 4 Salem 2 +0.1
+0.2
Lynchburg 3 Frederick 5 -0.1
Lynchburg 0 Frederick 1 -0.1
If winner is:HomeAway
Saturday100.0*Chance in playoffs100.0*Average seed
Potomac vs Salem+1.2-0.6
+0.3-0.2
Potomac vs Salem+1.2-0.6
+0.3-0.2
Lynchburg vs Frederick-0.5+0.9
+0.0-0.1
Lynchburg vs Frederick-0.5+0.8
+0.0-0.1
Winston-Salem vs Wilmington+0.1-0.2
+0.1-0.1

What If

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

100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs12345678Count
3810-092.8%291438,966
379-178.907941703,544
368-255.3551394037,478
357-330.6310402820238,834
346-412.11201450222992,689
335-53.64126551402,823,858
324-60.6104504235,574,628
313-7Out02261177,533,469
302-8Out0552436,664,702
291-9Out029703,488,185
280-10Out1189829,819
Total:1.3%0101523422728,196,172
Games Above .500
Chance Will Make Playoffs