As a melee champion...
How the hell do you fight Warwick?
also D: why can he do 10% of someone health every 6 secs?
How the hell do you fight Warwick?
also D: why can he do 10% of someone health every 6 secs?
Amumu can deal 18% of your health in 6 seconds. And that's without building any AP.
On the terms of fighting WW, if your a squishy, kite. His base MS is pretty terrible, and once he gets in combat, he loses his passive MS boost.
If your a tank, CC and walk away. Unless he's low enough for you to kill in a rotation, odds are the duel will just last till he eventually overwhelms you, as his sustain is most likely better than yours.
If your a bruiser, you have two options. Duel him, or burst him down. In a straight duel, you can win with a Bruiser with good sustained DPS and sustain. If he's low enough, you can try bursting him down. However, should you try to burst him down, only do so if you have the damage to finish him. If you don't he'll be at his most dangerous state, and you'll be out of damage.
Burst damage or be fed. If you don't have it you don't win. He's one of the best 1v1 vs sustain melee champs in the game. Its just his design.
Honestly just try playing warwick, his ult is so easy to miss due to the tiny hitbox any juke messes it up, half the time my Q won't latch on or i'm just out of range for it constantly.
I don't really see the point of picking him over any other jungler right now, the only real thing he brings too the table is his E damage reduction for tank cc builds and good 1v1 vs champions who can't just kite him he is pretty squishy early though so if he gets bursted and can't ult/get you low enough for his W to activate he loses.
TLDR:Just kill him, he is a worse Rek'sai/Xin
also D: why can he do 10% of someone health every 6 secs?
you seriously worryied about multiple 10%, js if the fight is done correctly you'll die before that, or he will.
Also just a small hint to an advantage vs ww 
build jax properly.