It’s 20 to 8 (Official clock system).

07:40

It’s 20 to 8.

Correct answer

08:20

It’s 20 past 8.

Error: mirror minute hand about the vertical axis

07:52

It’s 8 to 8.

Error: read minutes as hours with ‘past’ or ‘to’

08:53

It’s 7 to 9.

Error: confuse hour and minute hands and read as hours with ‘past’ or ‘to’