Printing a percent sign "%" using printf

Question:
How do you print a percent sign "%" using printf?

Answer:
Escaped percent sign is double percent (%%)

Code:
public class PrintPercentSign {
 
   public static void main(String[] args) {
 
      System.out.printf("4 out of 10 is %d%% \n", 40);
 
   }
}

Output:
$ java PrintPercentSign
4 out of 10 is 40%