One test said "2.978 percent African", and she thought she wasn't Black. (2.978%? Three decimal places, really?). Another test said 23% and she thought she was. (23%? So that means like one grandparent? Not really, it's unclear what the "percentage" means or if it even means the same thing from one company's test to another. It means something like "23% of your DNA, the parts we look at, matches some reference sample, that we got from somewhere." What does THAT mean though? What does "matching a reference sample" _mean_ in terms of where your ancestors were from? How has that been validated? And many companies don't even reveal their statistical methods.)
Or maybe it was "0 to 58%".
These "ancestry results", despite being expressed with five significant digits, are scandalously unscientific and of unclear meaning. It is not even clear what "percentage of your ancestry from Africa" _means_. You think people didn't move around and have children with people from all over until the 20th century? Cause they did.
If your great-great-something grandparent lived in what is present day Greece, but THEIR parent was born in what is present-day Egypt (or vice versa; either would be fairly unremarkable)... and you want to know what "percent Greek" your "ancestry" is, like that even means something? Like your DNA could somehow even reveal that great-great-something was born in what is now Egypt but their parent was born in what is now Greece? It can not. All of this is based on a weird fantasy/mythology of being able to separate people into historically continuous categories which remain stable over generations, that just isn't any kind of scientifically or historically justified.