Hello Nidhi,

It is hard to predict your percentile from an assumed data. 

Here is some ways through which you can know your percentile:

But before that you should know what is the difference between percentage and percentile.

• Percentage is calculated on basis of you marks out of 100 for each subject
• Percentile marks of a candidate in a Board or JEE (Main) reflect how many Candidates have scored below that candidate in his/her Board or JEE (Main) Examination
• Percentile score determines a value below which a certain percent of observations follow
• For example, the 40th Percentile is the value and score below 40 Percent or below are the observations to be found
• The Percentile of a Candidate will be calculated as:

100X Number of Candidates in the ‘group’ with aggregate marks less than the candidate scoring the highest marks
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Total number of candidates in the ‘group’

But as i told you, we can't predict your percentile with an assumed data. Hope this method to get percentile is clear to you, Thanks you.