How are these numbers calculated?

Big Games

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

Tuesday100.0*Average seed
Bucks 108 Pistons 91 -0.3
Pistons 79 Cavaliers 73 +0.1
Grizzlies 101 Pistons 103 +0.3
Spurs 89 Pistons 114 +0.1
Bulls 106 76ers 119 +0.1
Trailblazers 126 Hawks 123 +0.1
Bulls 121 Pacers 115 -0.0
Grizzlies 123 Bulls 85 +0.0
Saturday100.0*Average seed
Hawks 99 Rockets 115 +0.4
Raptors 107 Pistons 102 -0.2
Hawks 114 Suns 96 -0.2
Wizards 88 Hawks 109 -0.2
Hawks 113 Raptors 104 -0.1
Pacers 97 Pistons 126 +0.1
Hawks 124 Kings 77 -0.1
Pistons 119 Nets 98 +0.1
Games Above .500
Chance Will Make Playoffs