Baseball standings are ranked on winning percentage: wins divided by games played (W ÷ (W + L)), shown to three decimals, so 9–3 is .750. Ties are rare, because games go to extra innings, so most baseball tables have no tie column at all.
The other number every baseball table carries is games back (GB): how far a team is behind the leader. It is the gap in wins plus the gap in losses, divided by two. A team one win and one loss behind the leader is 1 game back; a team one loss behind with the same wins is half a game back.
Percentage and games back usually agree, but not when teams have played different numbers of games — which happens all the time in rec and youth baseball, thanks to rainouts. Winning percentage is the fairer ranking then; games back tells you what a team needs to make up.