def fractional_parameter(fractional_parameter, parameter2):
    """
    Defines fractional parameter link where the original parameter ranges
    between 0-1 of parameter2.

    Parameters
    ----------
    fractional_parameter : string
        new parameter that ranges between 0 and 1.
    parameter2 : string
        parameter that is larger or equal than the original parameter
    """
    return fractional_parameter * parameter2
