While the CBSE board itself does not issue separate "percentage certificates", you can create or obtain one based on their official guidelines. Review: Essential Features & Trustworthiness
A forum post told him: "The board doesn't provide them. Your school does." The Solution: He found a Sample Conversion Certificate and realized it just needed to be on school letterhead. The Action Plan cbse cgpa to percentage conversion certificate download
Percentage = CGPA × 9.5
Percentage = (CGPA × 9.5)