Baffling reference question of the day

"Do you know what 84% is?"

I was tempted to say, "It means that if you had 100 things, 84 of them would be one way." But instead I asked her what she really meant, and found out she wanted to know what it is on the grading scale. Of course, there's way more than one possible answer to that question as well, but I told her it was a B, and she was satisfied.