After that from 7:00 AM to 12:00 PM is 5 hours and from 12:00 PM to 3:00 PM is 3 hours. Now you just need to sum up these two numbers so it means 5:00 + 3:00 is 8 hours and that is answer to your question. Other way to solve this question is to learn how military time (24 hour format) works.Aug 24, 2018