What is the acceptable similarity percentage used for international journals?
What is the acceptable plagiarism percentage?
As a guide a returned percentage of below 15% would probably indicate that plagiarism has not occurred. However, if the 15% of matching text is one continuous block this could still be considered plagiarism. A high percentage would probably be anything over 25% (Yellow, orange or red).
It differs with different publishers, where it should be lower than 25% with Elsevier or Springer, but it should be lower than 10% with Nature.
It is different with the publisher, but average is 20% I think.
It's variable. For journal article, less than 20% similarity index usually suggests. In case of the book chapter, the limit is less than 10%.
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