At the very least the #div/0 error in Excel is annoying, perhaps because it highlights a flaw logic. Often it will be unavoidable especially if a the target cell is waiting for an Input from the user. Fortunately is a reasonable easy fix.
How to fix the #div/0 error
The error occurs because of using a zero in your division as below.
The best way to solve this is with the IFERROR() function because the function evaluates the formula and returns a specific value if there is an error. It will replace the #DIV error with your chosen alternative, in most cases that should be a zero (avoid using text if you can) as per the below:
And there is your fix.