so the input is an 8bit value
the result range if you remove the divider (100) is
((180*0)+3200)=3200
((180*255)+3200)=49100
the above numbers are still integers if you don't divide them with 100 and the decimal position is exactly the same, two digits from the back so to show these integers in the display you convert them to ASCII and put the dot in the second decimal from the back
3200= '3','2','0','0' which will be shown as '3','2','.','0','0'
49100= '4','9','1','0','0' which will be shown as '4','9','1','.','0','0'
this is in case of an LCD, since you are using led you only have to turn on the dot of the second character from the end and just show the integer right justified
Alex
---------- Post added at 12:17 ---------- Previous post was at 11:31 ----------
actually you don't even need the second decimal because it will always be 0 so you only need 4 led display