MAth Equation not working properly [closed]

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I have been working on a math equation for 2 days. The whole process is supposed to take the information from a driver and the return the final average. However, for some reason it is not processing correctly. Any ideas would be much appreciated.

public double Overall() {
    double开发者_JS百科 finalProjectGrade = ((projectGrade1 * 0.1) + (projectGrade2 * 0.1) + (projectGrade3 * 0.1) + (projectGrade4 * 0.1));            
    double finalQuizGrade = ((quizGrade1 * 0.5) + (quizGrade2 * 0.5));            
    double finalTest = (finalExam * 0.25);            
    double finalParticipationGrade = (participationGrades * 0.25);            
    double Overall = ( finalProjectGrade + finalQuizGrade + finalTest + finalParticipationGrade);            
    return Overall;
}

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I'm pretty sure you mean 0.05, not 0.5, for the quiz grades. Right now, you're giving them a weight of 50% each.