problem 3

#include <stdio.h>

int main ()
{
  float interest, p, r, n;

  printf ("Enter a value of p: ");
  scanf ("%f", &p);

  printf ("Enter a value of r: ");
  scanf ("%f", &r);

  printf ("Enter a value of n: ");
  scanf ("%f", &n);

  interest = p * r * n / 100;

  printf ("Final answer: %f", interest);

  return 0;
}

Enter a value for p:
Enter a value for r:
Enter a value for n: