Question regarding Duplicate Content

I understand that Google penalizes websites for duplicate content.

I have bought a database dump of text to compliment a website I have, and the content in the database has obviously been used on many other websites.

The text will only be about 1/5th of any given page's content, and I am curious to know whether this would fall under 'duplicate content' or not? where I would be penalized by Google.

Many other websites that use the content in a similar manner appear to be ranking quite well.

Thanks

 

yes it is fall under 'duplicate content' , But you can avoid add your own content into that page or rewrite.

 

Yea rwrite the content a little and u wont face problems

 

Hmm - rewriting isn't really an option as there will be 10k pages or more.

80% of the page will be original content, just one of the paragraphs will not be.

 

If it is just one paragraph on 1 page, it should be okay. However, i do advise you to rewrite/rephrase the paragraph to avoid any penalty from Google.

If it is one paragraph for every page, then you will have a serious problem. Definitely, you will have to recreate the content for that one paragraph.

 

Less than 100 words of duplicate content on a page is fine. As long as you add your own opinions or rewrite etc.

 

You really should try to mix the duplicate content with your own unique.
I can see that 10k pages can be a huge problem, but do you have to add all of them the same time?