Eight Four Suited vs King Nine Suited

At the flop:
Winning 26.76% of the time
Tied 0% of the time
Losing 73.24% of the time

At the Turn:
Winning 31.44% of the time
Tied 0% of the time
Losing 68.56% of the time

At the River:
Winning 35.21% of the time(15.29% with trips or better)
Tied 0.67% of the time
Losing 64.12% of the time(3.9% with trips or better)