How are these numbers calculated?

Big Games

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

Week of 4/11100.0*Chance in playoffs100.0*Average seed
Madureira 0 Boavista 0 +1.1
Fluminense 3 Nova Iguacu 1 -0.5
-0.1
Week of 4/15100.0*Chance in playoffs100.0*Average seed
Boavista 2 Vasco da Gama 2 In
+0.1
Flamengo 1 Vasco da Gama 3 -2.8
+0.2
Portuguesa 2 Flamengo 2 -0.8
-0.5
Fluminense 1 Botafogo 0 -0.5
-0.2
Madureira 4 Macae 2 -0.3
Bangu 1 Volta Redonda 1 +0.2
If winner is:HomeDrawAway
Week of 4/25100.0*Chance in playoffs100.0*Average seed
Portuguesa vs Boavista+0.6-0.8-0.8
Fluminense vs Madureira-0.3+0.3+0.3
Flamengo vs Volta Redonda+0.1-0.3+0.1

What If

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

100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TPW-D-Lplayoffs123456789101112RelegationCount
211-0-0In43507No2,144,835,192
18-19In100No1,523,856,808*
Total:In252946No3,668,692,000

* Row combines multiple less frequent records.

Points
Chance Will Make Playoffs