Best Answer

1/240

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

Q: What is 15 seconds as a fraction of 1 hour?

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1 hour = 60 minutes = 60*60 seconds = 3600 seconds So 20 seconds, as a fraction of an hour = 20/3600 = 1/180

It is: 60 seconds = 1 minute which is 1/60 of an hour

1/5 of an hour.

1 hour = 100% 1 minute in an hour = 1/60 therefore 30 seconds in an hour = 1/120

1 hour = 3600 seconds which means that 1 second = 1/3600 hour Hence 15 seconds = 15/3600 hour = 5/1200 = 1/240 hour

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It is: 15/3600 = 1/240 in its lowest terms

1 hour = 60 minutes = 60*60 seconds = 3600 seconds So 20 seconds, as a fraction of an hour = 20/3600 = 1/180

It is: 60 seconds = 1 minute which is 1/60 of an hour

1/5 of an hour.

1 hour = 100% 1 minute in an hour = 1/60 therefore 30 seconds in an hour = 1/120

1 hour 15 minutes is 4,500 seconds.

The fraction of 8 seconds/ 1 hour = 8 seconds/ 60 minutes = 8 seconds/ 3600 seconds. This would mean that 8 seconds is 1/ 450 of a hour and that 8 seconds is 0.222% of a hour.

1/9th

1 hour = 3600 seconds which means that 1 second = 1/3600 hour Hence 15 seconds = 15/3600 hour = 5/1200 = 1/240 hour

1/30

1/100

15 seconds x 1 hour/3600 seconds