45 sec / 1 hr = 45 sec / 3600 sec = 1/80
1/9th
No hour. It's just 1 minute and 45 seconds.
1\2
It is: 45/60 which is 3/4 of an hour in its simplest form
It is: 20/(60*60) = 1/180 of an hour
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
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
No hour. It's just 1 minute and 45 seconds.
1/30
1/100
It is: 1 and 45/60 which is 7/4 as an improper fraction in its lowest terms
1\2
It is: 45/60 which is 3/4 of an hour in its simplest form