Edit saved passwords from phone

I try to log into a site but there are old log in saved info in the drop-down mixed in with the updated ones Dor example, there are 5 of same hotel usernames but different passwords. Old passwords were not deleted when updated or changed... I want to delete old usernames and passwords from my phone. Laptop not available.. I know how to do it in my Mac but not in the phone… please advise. Thank you!