Calculate Total marks and percentage of a Student using C

#include<stdio.h>
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) / total;
printf("\nPercentage : %f\n",per);
}