According to MNNIT Allahabad rules, you need to multiply your CPI with 10 to get the percentage. If your CPI is 9.4, your percentage will be - 9.4*10 = 94. Although the MNNIT doesn’t have a specified formula for CPI to percentage conversion, this is the standard practice used for this calculation.
CPI stands for Cumulative Performance Index. There is no official process of conversion of CPI to a percentage for the score of students in MNNIT Allahabad. There are some circulars published by the institute as to how students can convert their score in CPI initially, and the details provided in them are listed below.
This is the only method of conversion of CPI score to a percentage for students in MNNIT Allahabad.