Why 7am to 4pm is 9 hours
16:00 minus 7:00 is 9 hours. 7am to 3pm ends an hour earlier. Unpaid lunch comes off after the 9.
FAQ
Is 7am to 4pm 8 hours of pay? Clock time is 9 hours. A 60-minute unpaid lunch makes 8.00. A 30-minute lunch makes 8.50.
How many hours is 7am to 3pm? 8 hours before breaks. That page is on this site.
Is this the same as 8am to 5pm? Same length, different clock times. Open that page if you start at 8.