Originally, this article was sent to a well-known math journal and was REJECTED. I called to find out why. The answer was astounding. The anonymous reviewers admitted that, yes, this is a short and foolproof way to get the correct answer to percentage problems, but...getting the correct answer was not paramount. You see, there was no "discovery learning" involved, they said, and therefore the article was not acceptable.
Now, you tell me, if there's a process that helps students surmount often-confusing multi-approachable percent-related problems, shouldn't it be shared? That's what I concluded. So here YOU are ready to DISCOVER it.