#include <stdio.h>

double alennettu(double h, int ale)
{
//  return h - h*ale/100;
  return h*(1-ale/100.0);
}

int main(void)
{
  double hinta,ale_hinta;
  int ale_pros;
  hinta = 100.0; ale_pros = 15;

  ale_hinta = alennettu(hinta,ale_pros);

  printf("%5.2lf -%3d%% on %5.2lf\n",hinta,ale_pros,ale_hinta);
  return 0;
}