We don't do exact rational math - instead we do real math and convert to rational output within the boundary conditions given by you via DENMAX, DENANY, and DENFIX. Hence we display a rational output together with the indication whether this rounded output is greater, exactly equal, or less than the (underlying, hidden) real result. This notation was and is perfectly understood by the customers of our WP 34S since 2011. It is a rational display mode, nothing more.
Some nitpicky remarks:
- Indications like ≤ or ≥ including equality are of little use.
- In principle, an elevated [+] instead of [>] and [-] instead of [<] can be displayed as well. I don't see an advantage for either notation besides [>] and [<] being introduced 11 years ago.