How are these numbers calculated?

Big Games

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

Week of 11/19100.0*Chance in playoffs100.0*Average seed
Kevin 63.4 Stephen 93 +9.5
+0.5
Piatt 91.3 Ryan 86.4 +3.3
+0.1
John 72.8 Evan 122.4 -2.6
Becky 97.2 Jess 108.8 -0.1
Week of 11/26100.0*Chance in playoffs100.0*Average seed
Stephen 82.7 John 128.4 -15.9
-0.4
Ryan 83.9 Kevin 123.3 +8.3
Evan 110.3 Becky 110.1 -0.7
Jess 53.7 Piatt 116.3 +0.1
Week of 12/3100.0*Chance in playoffs100.0*Average seed
John 99.6 Ryan 84.8 +10.3
+0.2
Becky 116.9 Stephen 72.4 Out
-0.4
Kevin 68.6 Jess 112.8 +10.3
+0.2
Games Above .500
Chance Will Make Playoffs