No, you misinterpreted, natural language is funny like that. I took those numbers straight from their page: https://www.yammer.com/customers/

     85 Percent of Fortune 500 Companies Use Yammer.
     ...
     200,000 companies - large and small - are 
     changing the way they work with Yammer

He just worded that sentence really awkwardly.

85% of Fortune 500 companies 200k companies total