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Verified Answer :

2.4 hours!

A clock has 12 hours, all you do is divide 12 by 5 and you get 2.4.

2.4 hours or 2 hours and 24 minutes represents  of a clock. 

The easiest way to find this is to divide 12 by 5 since there are twelve hours on a clock. 
I got the 24 minutes by multiplying 60(minutes there are in an hour) by .4 and got 24.