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An increase/decrease in profit 
20120313 

From Thanikasalam: It is understood that increase/decrease in profit for current year compared to the previous year is done by the formula (xy)/y, with x=profit on current year and y=profit on previous year. How do we derive this formula?
If we work on this formula of calculating increase/decrease in profit, we get x/y1
* = (xy)/y
= x/y  y/y
= x/y  1
How do you justify the 1 in the equation above. How to derive the formula and how do i prove it? Answered by Penny Nom. 


