No problemo!

When it comes to identifying which posts have been promoted, and which have not, there is no one way to know without the user’s data, which Instagram keeps private.

The percentage of people who see a particular posts for a particular account varies on the account and the post. Here’s a decent explanation of how the algorithm decides how to surface posts: https://medium.com/the-mission/how-the-instagram-algorithm-works-and-what-you-can-do-about-it-cca28d0b2b0b it is definitely a much larger percentage than Facebook, but there is no data on exact numbers. Hope this helps?