INTEREST CALCULATION :

Program Code :

#include<stdio.h>
#include<math.h>

main()
   {
      float principal,time,rate;
      printf("Enter the value of Principal , Time , Rate");
      scanf("%f%f%f",&principal ,&time, &rate");

      SI=(principal*time*rate)/100;

      printf("After calculation simple interset=%f",SI);

    }

Output :
  
    Enter the value of principal , Time , Rate
    1300
    5
    4.5
    
    After calculation simple interest= 292.5