So in decimal format this is expressed as 7.5 hours (7 and a half hours). Using our 7:30 example above, we intuitively know that 30 minutes is 'half an hour.' In decimal format one-half is expressed as '.5'. When we use decimal numbers each place in a number ranges from 0-9. The decimal hours format uses 'base 10' to represent time as common decimal numbers. 7:30 is read as 'seven hours and 30 minutes.' When we use this common expression of time we understand that it means seven periods of 60 minutes (7 hours) and one period of 30 minutes. So whenever we see time expressed with a colon (:) we know that we are seeing time in the hours and minutes format. Instead, we increase the hours by one and reset the minutes to zero and write 4:00. We express hours (60 minutes) and portions of an hour (minutes) with the format HH:MM. So when time is increased by one minute at 3:59, we don't write 3:60. By this we mean that time is expressed in 60 one minute units. The hours & minutes format uses 'base 60' to represent time. Note: Wondering if your totals are accurate? Read our brief article about the accuracy of totals > Are you interested in how time is properly converted from hours and minutes to decimal format for payroll? We'll review and compare these two common formats for displaying and expressing time.
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