import java.util.*;
import java.math.*;

public class nyu_101720140 {
	public static void main (String[] args) {
		Scanner scanner = new Scanner(System.in);
		int n = scanner.nextInt();		//city population
		int x = scanner.nextInt();		//number of wizards
		int y = scanner.nextInt();		//percentage over 100
		double percentage = (double)y / 100.0d;
		percentage = percentage - ((double)x / (double)n);
		n = (int)(Math.ceil((double)n * percentage));
		System.out.println(n);
	}
}
    								 		  	 				     		