Simple maths calculation

Hi,

A simple subtraction of two numbers 0.07 and 0.15 should have result of 0.55. But the flash player 9 or Flex Builder 3 give the following result.

trace(Number(0.70 - 0.15))//returns 0.5499999999999999 in flex builder 3 or FP9 

To my surprise, this calculation gives correct result of 0.55 in flash player 8.

I’m working on a Energy modeling application. Thus it is absolutely necessary for me to show the calculations to the correct precisions.

I cannot even round off the calculation as the equation is a resultant of some other calculation and i cannot do the round-off for each calculation, else it will make a huge difference in the final energy prediction outcome. Pls help me in this issue.