Description

To calculate percentage marks, calculate total mark obtained.
Multiply total obtained mark by 100 and divide it by total marks of exam.

C/C++

/* C Program to calculate percentage mark of student */
//Save it as PercentageMarkStudent.c

#include<stdio.h>
int main(){

    float mark1, mark2, mark3, totalMark, percentageMark;

    printf("Enter the marks in first subject : ");
    scanf("%f",&mark1);

    printf("Enter the marks in second subject : ");
    scanf("%f",&mark2);

    printf("Enter the marks in third subject : ");
    scanf("%f",&mark3);

    //Calculate total mark
    totalMark = mark1 + mark2 + mark3;

    //Calculate percentage mark
    percentageMark = (totalMark*100)/300;

    printf("Percentage mark = %.3f",percentageMark);

    return 0;
}

Input:
Enter the marks in first subject : 50
Enter the marks in second subject : 60
Enter the marks in third subject : 70

Output:
Percentage mark = 60.000

Java

/* Java Program to calculate percentage mark of student */
//Save it as PercentageMarkStudent.java

import java.io.*;
import java.util.Scanner;

public class PercentageMarkStudent {

    public static void main(String[] args) {

            Scanner scanner = new Scanner(System.in);
        
            float mark1, mark2, mark3, totalMark, percentageMark;

        System.out.println("Enter the marks in first subject : ");
        mark1 = scanner.nextFloat();

        System.out.println("Enter the marks in second subject : ");
        mark2 = scanner.nextFloat();

        System.out.println("Enter the marks in third subject : ");
        mark3 = scanner.nextFloat();

            //Calculate total mark
        totalMark = mark1 + mark2 + mark3;
        
            //Calculate percentage mark
        percentageMark = (totalMark*100)/300;

        System.out.println("Percentage mark = "+percentageMark);
    }
}

Input:
Enter the marks in first subject : 
50
Enter the marks in second subject : 
60
Enter the marks in third subject : 
70

Output:
Percentage mark = 60.0

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