
Percentage problem
Hey guys, this my first post here and I hope that there is someone that can help me with a problem that I came across. I'll try to explain :)
Basically I haveis one table with two rows. At one point of the table I have percentage P1 of sums of all previous values of x and y rows. At some other point I have second percentage P2, but also I know the values of x and y which made percentage increase... The problem here is to find what is the value of 1% at second point.
If we say that Sx is sum of x row, and Sy sum of y row, that percentage at some point is P=Sx/(Sx+Sy)... Just so you know what percentage am I talking about :)
Here is a picture of a table: http://img221.imageshack.us/img221/3903/percent.jpg
I hope that someone could help me with this one :) I guess that I just get lost somewhere in my calculations :)
Thanks...

Hi,
It's curious that you use the word "row" to mean "column" and "point" to mean "row"...
Please tell us if the following rephrasing is correct. You have two sequences of numbers: and . Also, there is a number . Let , , , . Also, let and . Do you need to find , or in the end?
If so, let and . Then you have two equations:
with two unknowns and , so the equations can be solved.

Hi emakarov, thanks for your answer :) I'm sorry for swapping row and column, about the point, I meant as a point in the time, since values are added every few seconds, as table changes all the time... Just that wasn't the issue so I didn't mentioned it :)
About the solution, funny thing is that I solved it 15mins ago... I guess that sometimes is a good thing to take a break :) You are right about the problem, and you described it very good... My solution went in a bit different way, but end result is the same, so thank you very much...
Oh, and sorry if my English is not perfect, it's not my native language :)
Thank you very much again...