Calculate Percentage of time
 

I'm trying to build a report that shows the callers percent of time (during
an 8 hour day) they spend on the phone. I have the callers total time for
the Month and I need to calculate two things:

Average amount of time spent on the phone per day (=Total Time/# Days worked)

Average % of time spent on the phone per day is where I'm confused. I
thought I would just divide =((Total Time/# Days worked)/8) but I'm getting
some strange results. For example, I have an Average time of 2:23:11, so
just divide that number by 8 and I got 1.24%. What am I doing wrong?

Answer: Calculate Percentage of time
 

To calculate the average percentage of time spent on the phone per day, follow these steps:

1. Convert the average amount of time spent on the phone per day to a decimal. For example, if the average time spent on the phone per day is 2 hours and 23 minutes, convert it to 2.38 (
   Formula:

   ---

   2 + 23/60 


   ---

   ).
2. Divide the decimal value by 8 (total hours available in a day) and multiply by 100 to get the percentage. For example, if the decimal value is 2.38, divide it by 8 and multiply by 100 to get 29.75%.

So, the average percentage of time spent on the phone per day for the caller in this example is 29.75%.

To double-check your calculation, you can also calculate the total time spent on the phone as a percentage of the total time available in the month (assuming 20 working days in a month). If the total time spent on the phone is 100 hours in a month, the total time available is 160 hours (20 days x 8 hours per day). Dividing 100 by 160 and multiplying by 100 gives you 62.5%, which means the caller spent 62.5% of their time on the phone during the month. Dividing this by 20 (number of working days) gives you 3.125%, which is close to the 2.38/8 x 100 calculation we did earlier.

Calculate Percentage of time
 

You assumed that Excel time is measured in hours, but it's measured in days,
so you need to multiply your answer by 24.
--
David Biddulph

"FrankTimJr" wrote in message
...
I'm trying to build a report that shows the callers percent of time
(during
an 8 hour day) they spend on the phone. I have the callers total time for
the Month and I need to calculate two things:

Average amount of time spent on the phone per day (=Total Time/# Days
worked)

Average % of time spent on the phone per day is where I'm confused. I
thought I would just divide =((Total Time/# Days worked)/8) but I'm
getting
some strange results. For example, I have an Average time of 2:23:11, so
just divide that number by 8 and I got 1.24%. What am I doing wrong?

Calculate Percentage of time
 

Try

=(AverageTime*24)/8

You could also write the formula as

=AverageTime/(8/24)

Excel stores times as a fraction of a 24-hour day (6:00 = 0.25, 12:00
= 0.5, 18:00 = 0.75, etc), so if you are doing arithmetic with the
number of hours (as in your value of 8 for hours/day), you need to
multiply by 24.

Format the cell for Percentage.

Cordially,
Chip Pearson
Microsoft Most Valuable Professional
Excel Product Group, 1998 - 2009
Pearson Software Consulting, LLC
www.cpearson.com
(email on web site)


On Fri, 16 Jan 2009 14:14:00 -0800, FrankTimJr
wrote:

I'm trying to build a report that shows the callers percent of time (during
an 8 hour day) they spend on the phone. I have the callers total time for
the Month and I need to calculate two things:

Average amount of time spent on the phone per day (=Total Time/# Days worked)

Average % of time spent on the phone per day is where I'm confused. I
thought I would just divide =((Total Time/# Days worked)/8) but I'm getting
some strange results. For example, I have an Average time of 2:23:11, so
just divide that number by 8 and I got 1.24%. What am I doing wrong?

Calculate Percentage of time
 

Thank you!!

"David Biddulph" wrote:

You assumed that Excel time is measured in hours, but it's measured in days,
so you need to multiply your answer by 24.
--
David Biddulph

"FrankTimJr" wrote in message
...
I'm trying to build a report that shows the callers percent of time
(during
an 8 hour day) they spend on the phone. I have the callers total time for
the Month and I need to calculate two things:

Average amount of time spent on the phone per day (=Total Time/# Days
worked)

Average % of time spent on the phone per day is where I'm confused. I
thought I would just divide =((Total Time/# Days worked)/8) but I'm
getting
some strange results. For example, I have an Average time of 2:23:11, so
just divide that number by 8 and I got 1.24%. What am I doing wrong?