I see both sides in this, and if I had to choose a side, I'd pick yours. Been a long time since my undergrad math minor, so could be stoking the fire here. Ask them if they'd be ok with (15/2)/8?
I've had to carry around fractions like that in solving problems, especially if it was something like (1/3)/7 as an intermediate.
As such, (15/2)/8 is an acceptable form, and as far as I'm concerned, I'm good with reducing that numerator to 7.5, so 7.5/8 it is. 😬