Below it the table which contains Actual Count and Error Count for each ID.


Code:
    USER_ID    |    Actual_Count    |	Error_Count
    -----------+--------------------+---------------------
    1345653		    5			          4
    534140349       5			          0
    682527813       4			          0
    687612723       3			          0
    704318001       5			          4




So if you look at the above scenario, For this `1345653` ID Out of `5`, it has `4` errors, same with `704318001` ID, out of `5` it has `4` errors. And all other ID's they didn't have any errors as `Error_Count` is `Zero` for them. So in general if I need to calculate what's the total error percentage, then How I will calculate that? Is it possible to calculate the total error percentage?