I'm trying to write an excel formula to calculate the performance improvement 
using timestamps.

Process A took 2hrs, 20 min, 9 sec  expressed as  2:20:09
Process B took 1hr, 12min, 28 sec  expressed as 1:12:28
Difference is calculated as a-b = 1:07:41

How do I calculate the Process B percentage improvement in processing time 
using these timestamps?

assume 2:20:09 is in cell A1
assume 1:12:28 is in cell B1
=(B1 - A1) / A1
and format for %
This would give -48% or a 48% decrease in time from 2:20:09 to 1:12:28.

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Hope this helps.  
If it does, please click the Yes button.
Thanks in advance for your feedback.
Gary Brown



"ghl" wrote:

> I'm trying to write an excel formula to calculate the performance improvement 
> using timestamps.
> 
> Process A took 2hrs, 20 min, 9 sec  expressed as  2:20:09
> Process B took 1hr, 12min, 28 sec  expressed as 1:12:28
> Difference is calculated as a-b = 1:07:41
> 
> How do I calculate the Process B percentage improvement in processing time 
> using these timestamps?