experience bar

I'm having an unusual problem for me, as I can't get an experience bar to work. I have a red horizontal bar, maximum 200px width. I have XPstart, XPend and XP, representing current level start XP, next level start XP and current XP respectively. now. how do I calculate the bar width. this is basic math for crying out loud :(

Inb4

<img src="http://profile.ak.fbcdn.net/hprofile-ak-ash2/41787_214277156210_9019_n.jpg" border="0" />

(XP - XPstart) / (XPend - XPstart) * 200

great, thanks ranma!

<img src="smileys/smiley24.gif" border="0" align="middle" />

why the frowny face? :D

You found out the answer by your own or you be trollin'?

More like:

<img src="http://memearchive.net/memerial.net/1033/son-i-am-derp.jpg" border="0" />

7Soul by myself waiting for at least half that quick response before started trolling. cmon a little bit of sense of humor please!

newt OMG is that Simon Cowell??

Actually I think it is. Seems /b/ does have some skills after all.