How are these numbers calculated?

Lottery

We are out of the playoffs. Here are the big games and what ifs for draft seeds.
Although it might be more fun to go down swinging.

Big Games

Saturday100.0*Lottery seed
Giants 18 Wiz 1 +0.2
Athletics 20 Dodgers 11 -0.2
If winner is:HomeAway
Sunday100.0*Lottery seed
Dodgers vs Athletics+0.3-0.3
Wiz vs Nationals-0.2+0.2

What If

100100100100100100100100100100100100100100
If finish:Chance will finish season at seed
TWW-L1234567891011121314
201-07525
190-12575
Total:5050
Games Above .500
Chance Will Make Playoffs