You wrote:

"LCDOUT $FE, $C0, DEC TEMPERATURE
I'll be reading 2555 "

Now:

ByteInteger = TEMPERATURE/100

ByteDecimal = TEMPERATURE-(ByteInteger*100)

LCDOUT $FE, $C0, DEC ByteInteger,",",ByteDecimal

You will see on your display 25,55.

You don't need to store the comma (separator) but you will store only ByteInteger and ByteDecimal in a location that can be recalled to read back the values. Than after the reading you will add the separator as above.

Al.