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Hi Firebird400, Sorry, not true: https://en.wikipedia.org/wiki/Percentage

Then there is this:

What is 250 as a percentage? 
 wikiHow Contributor 
 This completely depends on what the total is. 250 could be 100%. If it's out of 500,  
 then it's half, so 50%. If you drank 250ml of water out of a 500ml glass, you  
 drank half the water.

This is down the page at http://www.wikihow.com/Calculate-Percentage-Increase

Also at http://www.pryor.com/blog/quick-tips-for-calculating-percentages-in-excel/ is an explanation for both up and down in EXCEL. Take the figures given and see what happens when you calculate the way you suggest.

And then there is the online calculator at: http://www.calculatorsoup.com/calculators/math/percentage.php?given_data=Y_PX-What+is+P%25+of+X%3F&P=50&X=100&action=solve&last=Y_PX-What+is+P%25+of+X%3F



I'd venture to say that 50 is, indeed 50% of 100, not 25% and definitely not 75. As I said: "Actually 50% of 100 is 50, not 25, which is 25%. So a 50% loss recovery requires a 100% gain. It's 50 + 50 which equals 100, the starting point," not, "Now lose 50% = $75... Same percentage gain and loss but now you are down 25% from where you started...."

Best,

Allen