What is the name for this operation?
Effectively, take a range and adjust its center point to 0 on a number line.
In the case of the example above, I'm specifically looking for the name or operation which takes a number range of -28 to +72, and adjusts it back to -50 to +50.
I should also say, I'm looking for the terminology that hopefully doesn't require a math background. If the official terminology of the process is a pretty technical word, than I would love to see a simpler explanation that would suffice. Something a freshman in highschool would understand. Or even a middle schooler.