Solution of URI 1963 :: The Motion Picture

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/**Bismillahir Rahmanir Rahim.**/

#include <stdio.h>
int main()
{
    double A,B,C;
    scanf("%lf %lf", &A, &B);
    C = (((B-A)*100.00)/A);
    printf("%.2lf%%\n", C);
    return 0;
}