How to calculate the biology percentile score alone in neet 2020?

Hello there!
Greetings!
Actually,  you don't need to calculate your percentile of biology in neet as it is already mentioned in neet's result,  in the result physics, chemistry and Biology 's percentile scores are written separately and then there's overall percentile as well.
The percentile rank of a score is the percentage of scores in its frequency distribution that are equal to or lower than it. For example, a test score that is greater than 75% of the scores of people taking the test is said to be at the 75th percentile, where 75 is the percentile rank.
Thankyou