Greetings Aspirant,

You need to mention Your PCM Marks. I am assuming your PCB Marks as PCM.

As you got 286 in PCB in and if you want your Rank  to be between 1-500 you need to score at least 80% in KCET.

If you get your Desired rank you will surely be getting the College of your Choice.

Hope My Answer Helped You.

Best Of Luck For Future.