Hey Manish

You can not calculate marks based upon your percentile score.

Because percentile is relative score

Let's understand with an example:

In a 360 marks test 10 students appear and their marks as follows

100

120

140

150

200

240

250

255

290

300

In this student who score 200 marks got 50 percentile

Another case same 360 marks and 10 students but their marks are:

100

120

130

140

160

170

180

200

250

255



Now the student who score 200 marks secure 80 percentile. As marks are same in both the case but percentile is different means that percentile based upon the total students and number of students score more than you or ( equal or less than you)

So good luck