working out a percentage from my email open rates

Question

i have the following numbers:

recipients: $95$

opens: $39$

bounces: $2$

how would i get the percentage value per open?

accoridng to this post: http://www.campaignmonitor.com/blog/post/2395/all-about-email-open-rates

i would do the following:

open rate = opens / emails sent - bounces

Answer 1

I should think open rate = opens / (emails sent - bounces) * 100% would be more to the point. Order of operations is important!

If you want the percentage for one open in your whole set of emails, then you would just do (open rate for one open) = 1 / (emails sent - bounces) * 100%.