What are the chances of getting ITA if I have a score of 447 ? Do I need to apply for PNP?

With CRS 447 score, you have quite good chances of receiving an Invitation to Apply (ITA) from the Canadian Government. However, as per the recent CIC draws, the applicants with CRS 451 and above are given the invitation to apply from the Canadian Government. As you falling just four points from the current CRS draw, it is suggested to wait for the next Express Entry Draw.