Calculate the aspect ratio of a screen resolution in python

aspect_ratio.py

def calculate_aspect(width: int, height: int) -> tuple[int, int]:
    """ Calculate aspect ratio of a screen resolution """

    def gcd(a, b):
        """The GCD (greatest common divisor) is the highest number that evenly divides both width and height."""

        return a if b == 0 else gcd(b, a % b)

    r = gcd(width, height)
    x = int(width / r)
    y = int(height / r)

    return x, y

print(calculate_aspect(1920, 1080)) # (16, 9)
print(calculate_aspect(1024, 768)) # (4, 3)
print(calculate_aspect(300, 300)) # (1, 1)