import java.util.Scanner;

public class Main {

    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in); // 创建Scanner对象

        System.out.print("小明，Input your grage in last time "); // 打印提示

        double lastgrade = scanner.nextInt(); 

        System.out.print("Input your grade in this time : "); // 打印提示

        double thisgrade = scanner.nextInt(); 

        double improvement = (thisgrade - lastgrade)/(lastgrade) *100;

        System.out.printf("小明 your grade have  been improved  %.2f %%\n ",improvement ); // 格式化输出

    }

}