def retention_rate(customers_repurchasing_current_period,
                   customers_purchasing_previous_period):
    """Return the retention rate of customers acquired in one period who repurchased in another.

    Args:
        customers_repurchasing_current_period (int): The number of customers acquired in p1, who reordered in p2.
        customers_purchasing_previous_period (int): The number of customers who placed their first order in p1.

    Returns:
        retention_rate (float): Percentage of customers acquired in p1 who repurchased in p2.
    """

    return (customers_repurchasing_current_period / customers_purchasing_previous_period) * 100