def intensity_ratio(I_1, I_2):
    """
    A function that calculates the intensity ratio of two previously integrated intensities.

    Parameters
    ----------
    I_1 : float
        The integrated intensity to be on the numerator of the ratio.
    I_2 : float
        The integrated intensity to be on the denominator of the ratio.
    """

    return I_1 / I_2