Report to Summarize Activities converted to Opportunities

Good morning. Using CRM 2016 OnPremise I would like to create a report to show how many activities have been converted to Opportunities. Some of those activities are related to Marketing Campaigns but others don't. I understand the concept behind filtered views but I could not figure out how to link them in order to get the results I want. I am open to use Fetch XML too, if possible. Any guidance would be much appreciated.

Xavier