Khaidem, See, the percentage for the MAT FEB exam can be calculated as follows:-

(Your score or marks/ Total score) *100

In your case, (360.5/800)*100

which comes out to be equal to 46.188 percentage.

Now, to be honest, your composite score and the corresponding percentage is below average and your chances of getting the good B-schools are next to zero as the good B-schools require a score of close to 650-700 for selection.  However, you may still get a call from few colleges but it is advised to appear for the other management entrance exams as well to improve your chances of getting a good college. Here are a few colleges which you may get based on your percentage and previous years trends:-

CHANDIGARH UNIVERSITY

ASIAN BUSINESS SCHOOL, NOIDA

JAIPUR NATIONAL UNIVERSITY, JAIPUR

LBSITM, INDORE

INDUS UNIVERSITY, AHMEDABAD

CHITKARA UNIVERSITY, PATIALA

If you want to know about the colleges which you may get based on your score and previous years trends, then you can use this MAT PATHFINDER

https://bschool.careers360.com/pathfinder/mat