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Thread ID: 36033 2003-07-29 05:34:00 Math calculation asdex (1488) Press F1
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163611 2003-07-29 05:34:00 Hi, I know this is not really PC related but I I’m sure there are some really intelligent people who read here. I have a maths problem that is beyond my ability and I think someone out there might be able to solve it.
If something increased over 7 months and 22 days by 2.5% and then over 9 months and 2 days by 2% (2% on top of the 2.5%) what would be the total increase over the combined time periods and could this be calculated as a annual increase. If so what would it be?
Thanks 		asdex (1488)
163612 2003-07-29 05:56:00 Is this like your maths homework or something? vk_dre (195)
163613 2003-07-29 05:57:00 Im no maths guru but I think you need to break the problem down into managable chunks. You will need to get it straight in your mind all the variables.

1) Is the 9 months odd AFTER the 7 months
2) Is the 2% increase (after 7 months) including the total increase for the 7 months. eg if you started with $100 and after 7 months got $10 increase (dreamed up figure, I havent worked this out) so is 2% increase on $110 or $100?

After you got this sorted this out you can work back to one year by / 365.

HTH 		parry (27)
163614 2003-07-29 07:38:00 Hi Asdex: Digging deep into my past maths, I would suggest that this is a poorly worded problem.

That is, these type of calcs should specify the # of days, or a date range, rather than # of months. You are not told which months. It makes a difference, as you know many months have a different # of days.

I doubt it an accurate answer could be determined from the information provided, especially as an annual increase.

Can anyone assist, or comment on this problem for asdex? 		Bazza (407)
163615 2003-07-29 08:26:00 > Hi, I know this is not really PC related but I I’m
> sure there are some really intelligent people who
> read here. I have a maths problem that is beyond my
> ability and I think someone out there might be able
> to solve it.
> If something increased over 7 months and 22 days by
> 2.5% and then over 9 months and 2 days by 2% (2% on
> top of the 2.5%) what would be the total increase
> over the combined time periods and could this be
> calculated as a annual increase. If so what would it
> be?
> Thanks

Using an inital figure of 100.

100 + 2.5% = 102.5
102.5 + 2% = 104.55

That's a total increase of 4.55%



Now looking at the times involved (using a nice figure like 30 days per month) makes it more difficult - is the 9 months and 2 days AFTER the 7 months and 22 days (eg 16 months and 24 days?) or is it after a total of 9 months and 2 days (1 month and 10 days after the 7 months and 22 days).

Going with the 16 months 24 days (16.8 months) you'd get a figure of something like 3.25% increase in a year (12 months).

With 9 months and 2 days (9.07 months) you'd get a figure of something like 6.02% increase in a year (12 months).

You wouldn't really get an "annual" figure as you've got a change in the percentage at an unusual interval which couldn't be averaged out unless you could show a pattern to the change in percentage.

HTH (and I hope this is correct - it's been a while LOL)

Mike. 		Mike (15)
163616 2003-07-29 20:36:00 Thanks very much, this is about the figure i would guess. The times are one after the other.
Cheers 		asdex (1488)
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