What percentage of people will Like/Share something on Facebook vs. Liking/Sharing from a website?

[rball1]

I asked this on Quora and am curious what the Moz community has to offer: http://www.quora.com/What-percentage-of-people-will-Like-Share-something-on-Facebook-vs-Liking-Sharing-from-a-website

If I have a blog post that I share on Facebook and I receive 1,000 Likes and/or Shares, what's the percentage of those Likes/Shares that will come from people interacting with the post in their Facebook news feed vs. people Liking/Sharing the article on my blog? I realize many factors are at play here (type of content, audience, time of day, blog design, etc.) but have there been any studies that attempted to address this question?