Basically I need this image (and its border, if possible) to automatically adjust to 65% of whatever screen width it's being displayed in.

HTML Code:
<div style="margin-top: 35PX; WIDTH: 65%;" text-align="CENTER">
<img style="BORDER: 44PX RIDGE GREY; OUTLINE-STYLE: OUTSET;" src="http://www.ntnews.com.au/images/uploadedfiles/editorial/pictures/2012/02/14/dolphin.jpg" alt="">
</div>
Thanks. Harder than I thought!

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