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This is achieved as firstly one minute is 1/60 of an hour.

As the are 4 lots of 15 seconds in a minute, you multiply 60 by 4 (60x4) which is 240.

Therefore 15 seconds as a fraction of 1 hour is 1/240

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2011-10-14 17:09:29
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Q: What is 15 seconds as a fraction of 1 hour?
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