Reply To: simple fractions in equations

When numerator and denominator are printed at the same level of writing, you are correct not to use opening and closing fraction indicators. You do need to transcribe this using Nemeth symbols, inside the switches. There will be only one numeric indicator, before the 4 in your example.

_% #4_/6-1_/3 _:

I am happy to be able to refer you to the newly published 2022 edition of the Nemeth code, Rule 13.3.2.

Lindy