How do I avoid % in String.Format?

I put a SQL query statement in the string.xml file, but I want to write this code in String.Format.

SELECT Field1, Field2 FROM mytable WHERE Field1 LIKE '%something%' If you have a statement like this, I know that if you want this SQL statement to run as a string here, you'll see a single quote \', but I don't know how to mark the %s.