Find percentage and grade

#include <stdio.h>

int main()
{
    int phy, che, bio, math, com;

    float percen;

    printf("Give your Marks of Physics:\n");
    scanf("%d", &phy);

    printf("Give your Marks of Chemistry:\n");
    scanf("%d", &che);

    printf("Give your Marks of Biology:\n");
    scanf("%d", &bio);

    printf("Give your Marks of Mathematics:\n");
    scanf("%d", &math);

    printf("Give your Marks of Computer:\n");
    scanf("%d", &com);

    printf("\nYour Marks respectively Physics, Chemistry, Biology, Mathematics and Computer is %d %d %d %d %d \n", phy, che, bio, math, com);

    percen = (phy + che + bio + math + com) / 5;

    printf("Percentage = %.2f\n", percen);


    if(percen >= 90 && percen <= 100){
        printf("Your Grade is A");
    }else if(percen >= 80 && percen < 90){
        printf("Your Grade is B");
    }else if(percen >= 70 && percen < 80){
        printf("Your Grade is C");
    }else if(percen >= 60 && percen < 70){
        printf("Your Grade is D");
    }else if(percen >= 40 && percen < 60){
        printf("Your Grade is E");
    }else{
        printf("Your Grade is F");
    }

    return 0;
}