def romi(total_revenue, total_marketing_costs):
    """Return the Return on Marketing Investment (ROMI).

    Args:
        total_revenue (float): Total revenue generated.
        total_marketing_costs (float): Total marketing costs

    Returns:
        Return on Marketing Investment (float) or (ROMI).
    """

    return ((total_revenue - total_marketing_costs) / total_marketing_costs) * 100