Error when dividing two formulas

[Byanca5C3B]

I have summed boxes in one text box (text 13), and other boxes in another area (text 14). When I try to divide the first sum text box by the second sum text box I get an error in my t. See attached file.

[Test Screen Name]

Please show, or tell, us the exact error message. I don't see an error, but I don't know where to look. 

Remember not to divide by zero - you must check this first.

[Byanca5C3B]

It says the value entered does not match the format of the field, it seems to be because I am dividing by zero, but it is a fill in so it will be zero until something is put in. I've attached the formulas.

[Bernd Alheit]

I can't see any calculation in the form.

[Byanca5C3B]

It says the value entered does not match the format of the field, it seems to be because I am dividing by zero, but it is a fill in so it will be zero until something is put in. I've attached the formulas.

[Bernd Alheit]

With a script you can avoid the message.

[Byanca5C3B]

How do I do that, I dont know javascript

[Bernd Alheit]

Read this:

https://community.adobe.com/t5/acrobat-discussions/need-help-with-nan-error-and-or-field-do-not-matc...