Eight Three Suited vs Ace Seven Offsuit

At the flop:
Winning 27.9% of the time
Tied 0% of the time
Losing 72.1% of the time

At the Turn:
Winning 34.25% of the time
Tied 0% of the time
Losing 65.75% of the time

At the River:
Winning 39.37% of the time(14.2% with trips or better)
Tied 0.3% of the time
Losing 60.33% of the time(2.63% with trips or better)