class FraudSummary:
    def __init__(self, avg_amount, fraud_rate, avg_device_risk):
        self.avg_amount = avg_amount
        self.fraud_rate = fraud_rate
        self.avg_device_risk = avg_device_risk

    def __repr__(self):
        return (
            f"Average Transaction amount : {self.avg_amount:.2f}\n"
            f"Average Fraud Rate: {self.fraud_rate:.2%}\n"
            f"Average device risk score: {self.avg_device_risk:.2f}\n"
        )        

