Simple Interest calculation

/* Calculation of Simple Interest */

#include<stdio.h>

#include<stdlib.h>

int main( )
{
int rate,principle,time ;

float amount;
printf ( "Enter rate, principle, and time :  " ) ;
scanf ( "%d %d %d", &rate, &principle, &time ) ;
amount = (principle*rate*time)/100;
printf ( "Your resultant amount is Rs.%f ",amount) ;

system("pause");

return 0;
}