How to rewrite % percentage symbol.

[riccardo83]

how can i make a url rewrite from

http://www.example.com/topic,15449,-games-discuss%ion.html
to
http://www.example.com/showthread.php?t=15449

I tried this

RewriteRule ^topic,([0-9]+),([A-Z,a-z,0-9,_-]+)\.html?$ viewtopic.php?t=$1 [L]

and it will onbly rewrite urlwithout %

[edited by: encyclo at 1:53 am (utc) on May 29, 2007]
[edit reason] switched to example.com [/edit]