It’s 27 to 4 (Official clock system).

03:33

It’s 27 to 4.

Correct answer

03:34

It’s 26 to 4.

Error: 1 minute later

02:51

It’s 9 to 3.

Error: read minutes starting from hour markings and adding minutes

07:15

It’s a quarter past 7.

Error: confuse hour and minute hands