Acceptance Rate is best explained as a comparison of valid to invalid reports. For those that are interested in the details:
Let X = The count of all your valid and duplicate submissions, including P5 won’t-fix
Let Y = The total count of all your submissions, excluding any marked ‘not applicable’, have not yet been reviewed, or have only been triaged but not confirmed.
Acceptance Rate = (X / Y) * 100
It’s a simple ratio of all of your accepted submissions to date, versus all submissions you’ve ever made. We exclude ‘not applicable’ submissions, which are those that have been marked by us or a customer as having been made in genuine and well-intentioned error. (And obviously we don’t include submissions that haven’t been finalized yet!)