Using Similar Page Checker (http://www.webconfs.com/similar-page-checker.php) you can check if a website is similar to other one. Is there any rule of thumb how high percentage is accepted by Google. Meaning when Google consider that page is similar than other one and will not index it. I' having two pages within same domain where "how to order" -information is similar and that's why percentage is about 70. Thx