It’s 29 to 8 (Official clock system).

07:31

It’s 29 to 8.

Correct answer

07:30

It’s half past 7.

Error: 1 minute earlier

06:53

It’s 7 to 7.

Error: read minutes starting from hour markings and adding minutes

06:35

It’s 25 to 7.

Error: confuse hour and minute hands