Find Original Price Before Percentage Change

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MathOnDemand.com

As illustrated below, this application will return the Original Price of an item before a Percentage Change was applied that resulted in the Current Price.  In other words, it will return the Original Price of an item that has been marked down or that has incurred a price decrease given its percentage change.  

Alternatively, it will return the Original Price of an item that has been marked up or that has incurred a price increase given its percentage change.