is there a problem?

i doubt many would risk unvetted content from google drive, youtube would be safer.
there is no config settings in your code.
what type of osc and speed.
what have you tried to port code to 16f886 and what happened.
does it work on a 16f877a.
has it ever worked or is it just a proteus simulation, proteus does not really work for some real time things.
there is no schematic.
why use fp ,can you really expect accuracy to 2 decimals.
what does symmetric power supply pic 16f877a mean ,the code is just a display
but the voltages flicker and do not complain fixed, what does this mean , are the voltages out of control or is it the the readings
two dp accuracy from single asynchronous adc results is not plausible afaics esp without a stable voltage reference for adc