It’s 27 past 8 (Official clock system).

20:27

It’s 27 past 8.

Correct answer

20:28

It’s 28 past 8.

Error: 1 minute later

20:07

It’s 7 past 8.

Error: read minutes starting from hour markings and adding minutes

17:40

It’s 20 to 6.

Error: confuse hour and minute hands