This might be a very basic question but how do I figure out the percentage compliance if I have the following:

1414 test in which 12 had errors. I want to know the percentage compliance? This is what I think it is figured out. Please let me know if correct. 1414-12 = 1402 1402/1414 = .9915 * 100 = 99.1%

Yep, that's fine. Also this works:

(enter 12 into A1 and 1414 in B1) and in C1:
=(B1-A1)/B1

Format the cell as a percentage.