public class Rational {
	private int numerator = 0;
	private int denominator = 1;

	public Rational() {
	}

	public Rational (int num, int denom) {
		setNumerator (num);
		setDenominator (denom);
	}
	
	public void setNumerator (int towhat) {
		numerator = towhat;
	}
	
	public void setDenominator (int towhat) {
		denominator = towhat;
	}
	
	public int getNumerator () {
		return numerator;
	}
	
	public int getDenominator () {
		return denominator;
	}
	
	public Rational add (Rational other) {
		int a = this.getNumerator();
		int b = this.getDenominator();
		int c = other.getNumerator();
		int d = other.getDenominator();
		return new Rational (a*d+b*c, b*d);
	}
	
	public Rational subtract (Rational other) {
		int a = this.getNumerator();
		int b = this.getDenominator();
		int c = other.getNumerator();
		int d = other.getDenominator();
		return new Rational (a*d-b*c, b*d);
	}

	public Rational multiply (Rational other) {
		int a = this.getNumerator();
		int b = this.getDenominator();
		int c = other.getNumerator();
		int d = other.getDenominator();
		return new Rational (a*c, b*d);
	}

	public Rational divide (Rational other) {
		int a = this.getNumerator();
		int b = this.getDenominator();
		int c = other.getNumerator();
		int d = other.getDenominator();
		return new Rational (a*d, b*c);
	}

	public String toString () {
		return getNumerator() + "/" + getDenominator();
	}
	
}