import java.util.*;
public class Fraction {
    /**
     * declare attributes here
     */
	int numerator;
	int denominator;

    /**
     * declare constructor here
     */

	public Fraction(int numerator, int denominator){
		this.numerator = numerator;
		this.denominator = denominator;
	}
    /**
     * methods
     */
	private int gcd(int a, int b) {
        int temp;
        while (b!=0){
            temp = a % b;
            a = b;
            b = temp;
            }
        return a;
    }
	public int getNumerator(){
		return numerator;
	}
	public int getDenominator(){
		return denominator;
	}
	public void setNumerator(int number){
		numerator = number;
	}
	public void	setDenominator(int number){
		denominator=number;
	}
	public Fraction reduce(){
		int n = gcd(numerator, denominator);
		numerator /=n;
		denominator /=n;
		return this;

	}
    // add
    public Fraction add(Fraction other) {
        int newNum = (this.numerator*other.denominator + this.denominator*other.numerator);
		int newDeno= this.denominator*other.denominator;
		this.numerator = newNum;
		this.denominator=newDeno;
		this.reduce();
		return this;
	}

    //subtract
    public Fraction subtract(Fraction other) {
        int newNum = (this.numerator*other.denominator - this.denominator*other.numerator);
		int newDeno= this.denominator*other.denominator;
		this.numerator = newNum;
		this.denominator=newDeno;
		this.reduce();
		return this;
    }

    // multiple
    public Fraction multiply(Fraction other) {
        int newNum = (this.numerator*other.numerator);
		int newDeno= this.denominator*other.denominator;
		this.numerator = newNum;
		this.denominator=newDeno;
		this.reduce();
		return this;
    }

    // divide
    public Fraction divide(Fraction other) {
        int newNum = (this.numerator*other.denominator);
		int newDeno= this.denominator*other.numerator;
		this.numerator = newNum;
		this.denominator=newDeno;
		this.reduce();
		return this;
    }
	public void printFraction(){
		System.out.println(this.numerator + "/" + this.denominator);
	}

    /**
     * compare this with other, notice that param is Object type
     */
    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;
    }

}