You need to use the string concatenation operator + between the number and the string. Concatenating something of type T, that can be turned into a string via the static member function T.toString - say an integer - with a String automatically promotes the non-string argument to String. That is, your expression should be
(origSPs - SPLoss) < 2 ? (Math.round((float)FVOriginal / 2)) + " Range 3" : FVOriginal + " Range 3"
(note the extra leading spaces).
If you want to be explicit, you can do
(origSPs - SPLoss) < 2 ? Integer.toString(Math.round((float)FVOriginal / 2)) + " Range 3" : Integer.toString(FVOriginal) + " Range 3"
Again, you can test this with the standalone BeanShell interpreter. Put the lines