import java.util.Scanner;
public class XueShengBiLi
{
public static void main(String[] args)
{
int s = 0;
Scanner input = new Scanner(System.in);
for(int i = 1; i <= 10; i++)
{
System.out.println("请输入第" + i + "门成绩:");
int f = input.nextInt();
if(f >= 80)
{
s += 1;
}
}
input.close();
double pj = (s / 10.d) * 100;
System.out.println("大于等于80分的成绩占所有成绩的:%" + pj);
}
}