The answer to your question is that the class in question is a bad class, and needs to be fixed. If 45% of students are failing, then either the class needs to

The answer to your question is that the class in question is a bad class, and needs to be fixed. If 45% of students are failing, then either the class needs to be changed, or more effort needs to be made to prevent students from taking a class that they are likely to fail.