Would help if you could let me know which exam exactly youre targeting. Assuming youre referring to JEE Main, a 78 Percentile would land you a Rank anywhere between 240-245k.

For more information and Rank Prediction do follow the link below

For more information and College Prediction do follow the link below

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer