@uss_oatmeal@actuallyautistic Unfortunately I think they'd say 15/2 is also not a proper fraction, and to be fair, it isn't one because the numerator is larger than the denominator. But "15/2" was absolutely the math I was doing in my head.
The issue arose because my mom uses a certain data entry system at her job that uses standard form fractions and decimal equivalents in sixteenths (e.g., 5/16 would be 0.5 in their system). Which is WAY more confusing to me than my own mental math 😅.