def linear_interpolation(start: float, stop: float, percent: float) -> float:
    """
    Linear interpolation function
    :param start: starting value for interpolation
    :param stop: ending value for interpolation
    :param percent: proportion of the way through interpolation (0.0 -> 1.0)
    :return: the interpolated value
    """
    return (1 - percent) * start + percent * stop