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7 1/2 hours

or

7.5 hours

or

7 hours 30 minutes.

An easy way to do this is to convert the pm time to 24 hours clock and then subtratc.

Hence

4:15 pm = 1615 hr.

1615 -0845 = 0730 hrs or 7:hrs 30 mins.

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lenpollock

Lvl 17
1w ago

What else can I help you with?