How do I calculate percentage change?

If I have two numbers for example:



2001 profits $40,100,100,100

2003 profits $90,222,222,222



How do I calculate the percentage change?How do I calculate percentage change?
They increased by.

2.25%, 2.22%, 2.22%, 2.22%.

Now they change by.

.444,.455,.455,..455 and so on.How do I calculate percentage change?
The absolute value of the difference between the two divided by the average of the two, times 100, give you the percent difference.

Since it's an absolute value it doesn't matter which number is x1 or x2



abs((x1-x2)/((x1+x2)/2))*100



so that would be

abs((40,100,100,100-90,222,222,222)

divided by

((40,100,100,100+90,222,222,222)/2)

times 100 for the percentage

or

76%

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