discount for purchase in java

/* total and average */
class add
{
public static void main(String args[])
{

float pa = 5000.0f;
float dis = pa*10/100;
float bill = pa-dis;

System.out.println("you purchased amount :"+ pa );
System.out.println("discount :" + dis );
System.out.println("you have paid to :" + bill );
}
}

output :

you purchased amount :5000.0
discount :500.0
you have paid to :4500.0