7 c 3 fl oz – 3 c 4 fl oz

I seem to be in a pickle lads.

2 answers

argghhh, just go metric to avoid such archaic calculations.

I would have to look up about cups vs ounces, and then get
further confused with fluid ounces vs ounces of mass
8 fl oz per cup, so
7 3/8 - 3 4/8 = ___