Hi,
A quick'n'easy way could be if you changed your ADC resolution from 8 to 10 bits and then:
Code:
DEFINE ADC_BITS 10
ADVAL VAR WORD             '<----Don't forget to change this to a WORD

loop: 
  ADCIN 0, adval                              'Store ADC value to adval
  ADVAL = ADVAL * 10 / 102                    'ADVAL is now between 0-100
  Serout 4, 6, [254, 1]
  pause 2
  serout 4, 6, [#adval]                       'display to the LCD
  pause 250
  Goto loop                                   'Do it forever
End
/Henrik Olsson.