Again, we're distinguishing between a mathmatical procedure and a Calculator behavior. "+15%" is, by convention, an accepted, implemented and utilized method of finding out the result of making a number X-percent larger. But yes, your understand of percent seems to be pretty solid. nk On Nov 28, 2005, at 12:04 PM, John Baltutis wrote: > If you want to make a number, say x, fifteen percent bigger, then the > appropriate mathematical function is: x * 1.15, not x + 15%. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://listserver.themacintoshguy.com/pipermail/x4u/attachments/20051128/9dfc8f99/attachment.html