How do you write 2 40 pm in Spanish?

To write 2:40 p.m. in Spanish, you would use the 24-hour clock system. This means that instead of saying "2:40 p.m.", you would say "14:40". The time is expressed in hours and minutes, separated by a colon. Since "p.m." indicates afternoon, there should be no need to write it afterwards.

Therefore, 2:40 p.m. in Spanish would be 14:40.