Simplify the following text for a Grade 10 native English-speaking person.
Original: In contrast , the 2007 MicropÃ dia has roughly 65,000 articles , the vast majority ( about 97 % ) of which contain fewer than 750 words , no references , and no named contributors .
Simplified: The 2007 MicropÃ dia has about 65,000 articles , and about 97 % contain less than 750 words , no references , and no named contributors .