public class Fraction {
	private int numerator, denominator=1;

	public int getNumerator(){
		return numerator;
	}
	public int getDenominator(){
		return denominator;
	}
	public void setNumerator(int numerator){
		this.numerator = numerator;
	}
	public void	setDenominator(int denominator){
		if (denominator!=0) this.denominator = denominator;
	}
	public Fraction(int numerator, int denominator){
		if (denominator==0) return;
		this.numerator = numerator;
		this.denominator = denominator;
	}

	public static int gcd(int a, int b) {
		while (b!=0){
			int temp = a % b;
			a = b;
			b = temp;
		}
		return a;
	}

	public Fraction reduce(){
		int n = gcd(numerator, denominator);
		this.numerator /=n;
		this.denominator /=n;
		return this;

	}

	public Fraction add(Fraction other) {
		this.numerator = this.numerator*other.denominator + other.numerator*this.denominator;
		this.denominator = this.denominator*other.denominator;
		return this;
	}
	public Fraction subtract(Fraction other) {
		this.numerator = this.numerator*other.denominator - other.numerator*this.denominator;
		this.denominator = this.denominator*other.denominator;
		return this;
	}

	public Fraction multiply(Fraction other) {
		this.numerator = this.numerator*other.numerator;
		this.denominator = this.denominator*other.denominator;
		return this;
	}

	public Fraction divide(Fraction other) {
		if(other.numerator==0) return this;
		this.numerator = this.numerator*other.denominator;
		this.denominator = this.denominator*other.numerator;
		return this;
	}

	public boolean equals(Object obj) {
		if (obj instanceof Fraction) {
			Fraction other = (Fraction) obj;
			this.reduce();
			other.reduce();
			if (this.numerator==other.numerator&&this.denominator==other.denominator) return true;
				else return false;
		} else return false;
	}
	// public static void main(String agrs[]){
	// 	Scanner newScan= new Scanner(System.in);
	// 	Fraction new1 = new Fraction(1,1);
	// 	Fraction new2 = new Fraction(2,0);
	// 	System.out.println(new1.equals(new2));
	// 	new1.subtract(new2);
	// 	new1.printFraction();
	// }

}