Simple Question

[Slnj]

Hi guys it's been a while since i been on this site, and school just started and i took another computer science class and I'm learning java now . So anyways my teacher gave me some stuff to program i did all except for one which i tried to program but I'm getting a different answer then what I'm expecting to get.

Quote:

Write a program that calculates the amount of tax on $5.75 saves it to a new variable and then outputs the information on the screen.

This is what i tried so far.

Quote:

public class problem6
{
public static void main (String[] args)
{
double a = 5.75 / 0.13;
double b = a - 5.75;
System.out.println (" The tax on 5.75 is " + a + " , the original price is " + b);
}
}

This is the out put i get

Quote:

The tax on 5.75 is 44.230769230769226 , the original price is 38.480769230769226

Am i doing something wrong? [/quote]

[techietim]

code:

public class problem6 {     public static void main (String[] args)     {         double price = 5.75;         double tax = price * 0.13;         System.out.format ("The tax on $%.2f is %.2f\nTotal:%.2f", price, tax, price + tax);     } }

[TheGuardian001]

Calculating tax is multiplying by the tax rate, not dividing by.

5.75 * 0.13 = 13/100ths of 5.75 = 0.7475

dividing by any number between 1 and 0 will increase the number. Dividing by 0.13 is the same as multiplying by about 7.7.