How are these numbers calculated?

Big Games

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

Week of 4/25100.0*Chance in playoffs100.0*Serie A2100.0*Average seed
Palmeiras 1 Mirassol 2 +5.9
-0.1
+0.2
Santos 0 Corinthians 2 +2.6
+0.1
Ponte Preta 1 Mirassol 2 +1.9
+0.1
Santo Andre 0 Guarani 1 -0.9
-0.1
Botafogo 1 Sao Caetano 1 +0.1
-0.1
Week of 5/1100.0*Chance in playoffs100.0*Serie A2100.0*Average seed
Bragantino 1 Santos 1 In
Ponte Preta 3 Guarani 1 +0.1
Mirassol 1 Ferroviaria 3 -0.1
Santo Andre 2 Mirassol 1 -0.1
Guarani 2 Novorizontino 1 -0.1
If winner is:HomeDrawAway
Week of 5/9100.0*Chance in playoffs100.0*Serie A2100.0*Average seed
Inter de Limeira vs Guarani+0.1+0.1-0.2
Mirassol vs Sao Paulo+0.1+0.1-0.2

What If

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

100100100100
If finish:Chance inChance will finish regular season at seedSerie
TPW-D-Lplayoffs1234A2Count
18-20In100No1,117,986,295*
170-0-1In6535No685,435,801
Total:In8713No1,803,422,096

* Row combines multiple less frequent records.

Points
Chance Will Make Playoffs