Talk:Data compression ratio

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"The 10MB file that compresses to 2 MB would have ((10-2)/10)*100% = 80% compression ratio."

Is this formula really true? The table provided in http://www.7-zip.org/ doesn't complain to it at all. --riba 01:40, 7 February 2006 (UTC)

And what about compression ratios greater than 100

( (1000 - 1) / 1000 ) * 100 = 99,9% ?

so this sux

I agree. I've never seen a compression ratio expressed like this. Changing article.

Unfortunately, the formula used on the maximumcompression.com site, as well as the table at 7-zip.org, ignore the terminology used throughout many decades of data compression research and technology. Ratio means ratio, and a higher compression ratio means higher compression. I'll add some references. AndreasWittenstein 07:12, 27 March 2007 (UTC)BitJazz

needs clean up needs refs and soucres needs a link section as wellOo7565 20:16, 29 May 2007 (UTC)