The percentile is calculated upto five decimal places. The formula that will be used to calculate MHT CET 2020 percentile is:

MHT CET Percentile Score = 100 * (Number of candidates in exam with normalized marks ≤ the candidate) ÷ Total number of candidates in the exam. Whatever for a score of 149 you can expect a percentile above 99 and rank would be under 500.

Hope it would be helpful.