Take a Look at this List showing you the Engagement Rates on Instagram you should be receiving with the amount of Followers you have:
500- 1000 Followers = 150-250 Likes Per Post
1000-3000 Followers = 200-300 Likes Per Post
3000-5000 Followers = 350-750 Likes Per Post
5000-10,000 Followers = 350-800 Likes Per Post
10,000 – 20,000 Followers = 500 – 1000 Like Per Post
20,000 – 30,000 Followers = 900 – 1500 Likes Post Post
30,000 – 40,000 Followers = 1,000 – 2,000 Likes Per Post
40,000 – 50,000 Followers = 1,000 – 3,000 Likes Per Post
These figures are subjective and have been determined from data gathered from over 20 accounts in the Travel, Health, Fitness, Marketing & Manufacturing Industries. If you are receiving more than you have a very healthy engagement rate! 
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Engagement levels will drop during different times of the year, so do not worry if that has happened to you. This is perfectly normal. Although, these are the numbers you should be trying to achieve.
If brands see that you are not consistently hitting these numbers, they will not be attracted to use you. As they will believe you have PAID for your followers or do not have an engaging community.
Key Tip is to therefore focus on increasing your engagement, if your numbers are below these suggested engagement rates.
If you would like support on how to do this please send me a Direct Message. Will respond .
Thanks for reading
Nico 
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Nicolas McKenzie 
How often should you post pics on Instagram?
Great question! No more than 2 times a day. With a minimum of 6 hours gap between each post. 😃
This is a fantastic article. I especially like it because with less than 10000 followers (9600) we average between 700-1000 likes. So that means we’re doing pretty great for engagement.