Sum of average growth

Adragoon

New Member
Joined
Sep 12, 2014
Messages
1
Hi, I'm new to the forums and was wondering if someone could help me.


I need to find the average growth rate and can't seem to figure out a simple formula for it. For example:


B1 = 3
B2 = 6
B3 = 9


=Sum((B3/B2)+(B2/B1))


Is there a simpler formula for this? I have a rather large pool of data.


Thanks for your help!
 

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Using Function Arguments with nested formulas
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BiocideJ

Well-known Member
Joined
Jan 23, 2012
Messages
1,733
First off, welcome to the forum!
In answer to your question, the SUMPRODUCT formula does pretty much what you are asking.

the equivalent to your formula would be
=SUMPRODUCT(B2:B3/B1:B2)

If you have a range of values from B1:B100 your formula would be
=SUMPRODUCT(B2:B100/B1:B99)

Note that the two ranges are the same size, but just offset by one row.
 

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