Someone displaying that percentage incorrectly. Instead of this, expression #3 should be used, and change the numeric formatting in the chart to percentage. There might be a reason it's handled this way in this specific case, of course.
Thanks! I'm still trying to find time in my schedule, but I do have the support of my employer for contributing here again. And I really should have talked about set analysis, as that was more the real question here. Thanks for doing so, balrajahlawat.
The last expression has an easily-missed "&" in it to append the "%" rather than have it as part of the numeric format, so I believe it would show as 40.0% instead. Well, it looks like there's a missing ")", so that can be the source of some confusion, and what was really intended isn't entirely clear. I was thinking it belonged before the "&" since I think that would give the right answer, but if you put it after the end of the whole expression, then yeah, it would probably show the wrong answer, 4000.0%.