C Program - Calculate percentage

#include <stdio.h>
#include <conio.h>

void main()
{
    int s1, s2, s3, s4, s5, sum, total = 500;
    float per;
    printf("\nEnter marks of 5 subjects : ");
    scanf("%d %d %d %d %d", &s1, &s2, &s3, &s4, &s5);

    sum = s1 + s2 + s3 + s4 + s5;
    printf("\nSum : %d", sum);

    per = (sum * 100)/500;
    /* percentage formula*/
    printf("\nPercentage : %f", per);
    getch();
   
}

Output

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