///////    TestFract.java     ///////

class TestFract
{
    public static void main(String args[])
    {   Fraction x= new Fraction(1,20);
        Fraction u= new Fraction(-1,60);
        Fraction v= new Fraction(1,30);
        Fraction y = (Fraction) x.clone();
        System.out.println("y=" + y );
        y = x.plus(u).minus(v);
        System.out.println(x + "+(" + u + ")-" + v + '=' + y);
    }
}