#include<iostream>
using namespace std;
int const HUNDRED = 100;
int main() {
int sapt_trecuta, sapt_curenta, procent;
cin >> sapt_trecuta >> sapt_curenta;
procent = ((sapt_curenta - sapt_trecuta) * HUNDRED) / sapt_trecuta;
cout <<procent;
return 0;
}
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