Engagement rate = (post|actions + post reaction|actions + comment|actions) / reach * 100;

Engagement rate = engagement / followers * 100;

Engagements = retweet_count + favorite_count;

Engagement rate = engagements/followers/new_tweets*100

Engagement rate = (engagements / impressions) * 100

Average Engagement = (clicks + (total_engagements - clicks)) / impressions * 100