The Tracking rates for Click Rate, Open Rate, and Unsubscribe Rate report differently in Marketing Cloud Engagement than Salesforce due to a difference in the rate calculation.
If there were 100 sent, 10 clicked, and 10 bounces:
You will need to create your own custom field and apply a formula on that field "Number_of_Unique_Clicks__c / Number_Delivered__c" to get the desired results.
The denominator is the part that makes the rates match. Make the same edit to change the denominator to Number Delivered for 'Open Rate' and 'Unsubscribe Rate' in order for the rates match.
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