Answer :
If your "54.36 :-0.1" was meant to be a ratio, it'd be clearer if you were to type it in as
54.36
------- , which has the value -543.6 / 1, or just -543.6.
-0.1
54.36
------- , which has the value -543.6 / 1, or just -543.6.
-0.1