class Rational {
    // Rational
    private int num2;
    private int num;
    private int den;
	private int den2;
	   public Rational(){
        den = 1;
        num = 2;
        den2 = 1;
        num2 = 2;
    }
    public Rational(int numerator, int denominator){
        num = numerator;
        num2 = numerator;
        den = denominator;
        den2 = denominator;
    }


    // getNum
    // getDen
    // getDecimal
    // getRational
    // getOriginal
    // reduce
    private int getGCF(int n1, int n2) {
        int rem = 0;
        int gcf = 0;
        do {
            rem = n1 % n2;
            if (rem == 0)
                gcf = n2;
            else {
                n1 = n2;
                n2 = rem;
            }
        }
        while (rem != 0);
        return gcf;
    }

	public String reduce(int n1, int n2){
		int gcf = getGCF(n1, n2);

		return n1/gcf + "/" + n2/gcf;

	}

    public int getNum(){
        return num;
    }

    public int getDen(){
        return den;
    }

    public double getDecimal(){

        return (double)num/den;
    }

    public String getRational(){
        int gcf = getGCF(num, den);

        return num/gcf + "/" + den/gcf;
    }

	public String multiply(Rational r1, Rational r2){
		String answer;

		int numa = r1.getNum() * r2.getNum();
		int dena = r1.getDen() * r2.getDen();

		answer = numa + "/" + dena;

		return answer;
	}

	public String divide(Rational r1, Rational r2){
		String answer;

		int numb = r2.getNum() * r2.getDen();
		int numc = r1.getNum() * r2.getDen();

		return answer;
	}

	public String add(Rational r1, Rational r2){
		int gcf = getGCF(r1.getNum(), r2.getDen());

		int den = gcf;
		int num = (r1.getNum()/gcf) + (r2.getNum()/gcf);

		return num + "/" + den;
	}

	public String subtract(Rational r1, Rational r2){
		int gcf = getGCF(r1.getNum(), r2.getDen());

		int den = gcf;
		int num = (r1.getNum()/gcf) - (r2.getNum()/gcf);

		return num + "/" + den;
	}

    public String getOriginal(){
        return num + "/" + den;
    }
}