Help writing expression

How do I write an expression to subtract one textbox from another textbox,
but not let its value be over +-10%? To be exact, I have 3 textboxes filled
in; [SYearBuilt] [CYearBuilt] [CImprovementValue]. I need to find out the
difference of the number in [SYearBuilt] and [CYearBuilt], then I need the
number to be lessthan or equal to 10, then devide it into 100, and then
multiply it by [CImprovementValue]. This is for making an adjustment on a
home;Age Difference, One Percent for each year, up tp 10%. Please point me
in the right direction because I'm LOST!!!!

I think that you should be able to do what you want by using the iif()
function. Try:

=iif([CYearBuilt]-[SYearBuilt]10,10,[CYearBuilt]-[SYearBuilt])/100*[CImprovementValue]

I'm not completely sure I got the entire formula the way you want it, but I
think that the iif() part will enable to do what you want even if the rest is
off.

HTH, Ted Allen

"SuMeRbOaRd" wrote:

How do I write an expression to subtract one textbox from another textbox,
but not let its value be over +-10%? To be exact, I have 3 textboxes filled
in; [SYearBuilt] [CYearBuilt] [CImprovementValue]. I need to find out the
difference of the number in [SYearBuilt] and [CYearBuilt], then I need the
number to be lessthan or equal to 10, then devide it into 100, and then
multiply it by [CImprovementValue]. This is for making an adjustment on a
home;Age Difference, One Percent for each year, up tp 10%. Please point me
in the right direction because I'm LOST!!!!