cumulative increase

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dave - 24 Jun 2005 02:15 GMT

Hi all
I hope you can help me settle a ongoing difference of interpretation of what would be the cumulative increase of the following five numbers.
469.6
477.6
492.8
507.1
514.5
Is it 44.9, which is the difference between the starting, and ending number, which i think it is. Or is it 44.9 /469.6 =.095613 which my friend thinks it is, my point to him is he is calculating a cumulative percentage increase not a cumulative increase. Thanks in advance.

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William Elliot - 24 Jun 2005 03:06 GMT

> I hope you can help me settle a ongoing difference of interpretation of what would be the cumulative increase of the following five numbers.
> 469.6
> 477.6
> 492.8
> 507.1
> 514.5

> Is it 44.9, which is the difference between the starting, and ending
> number, which i think it is.

Yes.

> Or is it 44.9 /469.6 =.095613 which my friend thinks it is, my point to
> him is he is calculating a cumulative percentage increase not a
> cumulative increase. Thanks in advance.

The percentage increase of the cumulative increase.
The accumulative percentage increase is
8/469.6 + 15.2/477.6 + ...

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Math Forum / Mathematics / Undergraduate Math / June 2005

cumulative increase