How to Use Algebra to Create a Time Card

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The algebra that is primarily used in creating a time card is dimensional analysis, which involves converting one unit to the next. Convert minutes into a fraction of an hour to do algebra with time cards with help from a math teacher in this free video on math help and algebra.

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Video Transcript

So how does one use algebra to create a time card? Hi I'm Jimmy Chang and I have been teaching college mathematics for over nine years and the algebra that is primarily used in creating a time card is actually a dimensional analysis which sounds very technical but all it is is you are converting from one unit to the next. Now often times when creating a time card you are often dealing with hours and minutes so when it comes to converting often times you work so many hours but also so many minutes so the best thing to do is convert those minutes into a fraction of an hour. So as long as you understand that of course sixty minutes equals one hour you should be good to go. So here is an example as to how you would do that. Suppose a typical day would be 8:30 a.m. to 12 p.m. and then take a 45 minute lunch break let's just say, you start from 12:45 to 5 p.m. Now let's take a look at the 8:30 to 12. Now you know that 8:30 in the morning to 12 p.m. represents 3 hours and 30 minutes but it's best to convert everything into just hours so you know that one hour is 60 minutes to basically convert 30 minutes to hours so just divide that by 60 and you'll have as a result 3 and 1/2 hours or it might be better to write it as 3.5 hours. Now let's talk about the 12:45 to 5 p.m. Now 12:45 to 5 p.m. you know represents 4 hours and 15 minutes. Again take that 15 minutes and divide that by 60 to figure out how many hours 15 minutes is. Now 15/60 reduces to 1/4 of an hour which you know is .25 so really 12:45 to 5 p.m. represents 4.25 hours. Now all you have to do to figure out the total number of hours worked on that particular day is take 3.5 and add 4.25 and you'll get a grand total of 7.75 hours worked on that particular day. Now you could repeat that for a 5 day work week if you like or if there is some hour adjustments, as long as you convert the minutes to the appropriate amount of fraction hours you'll be good to go for a week, a month, any time period that you would like. So I'm Jimmy Chang and that's how you would use algebra to create a time card.


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