Rational.java

public class Rational {
    private int x, y; // x/y

    public Rational(int x, int y) {
        this.x = x;
        this.y = y;
    }

    public int getNumerator() {
        return x;
    }

    public int getDenom() {
        return y;
    }

    public boolean isEqual(Rational num) {
        // return this.x * num.y == this.y*num.x;
        if (this.x * num.y == this.y*num.x)
            return true;
        else {
                return false;
        }
    }

    public Rational multiply(Rational num) {
        int mulX = this.x *num.x;
        int mulY = this.y *num.y;

        Rational res = new Rational(mulX, mulY);

        return res;
    }

    public Rational divide (Rational num) {
        Rational makloob = new Rational(num.y, num.x);
        return this.multiply(makloob);
    }

    public String toString() {
        return this.x + "/" + this.y;
    }

}