there is no certain rule in wbut..but we follow the aicte norms i.e percentage= (DGPA- 0.75)* 10 . if you are looking for the job..it depends on the company or organization as because wbut has no rule..some company sets their own scale of percentage, some follow the aicte norm (as stated above) , some only takes the DGPA * 10...SO THEIR IS NO CERTAIN RULE BUT IN MAJORITY AICTE RULE IS FOLLOWED.