It’s a quarter to 7 (Official clock system).

06:45

It’s a quarter to 7.

Correct answer

07:15

It’s a quarter past 7.

Error: mirror minute hand about the vertical axis

06:51

It’s 9 to 7.

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

09:45

It’s a quarter to 10.

Error: quarter to 10