Question : I need to know if I have a fraction.

I'm running Notes Designer V7.0.3. Our tellers must balance their drawers each day. I have created a database that collects this information. When they enter the coin count I would like to alert them when they have entered an invalid number for a particular coin. For example if you enter 1.20 for Nickels, you're fine; if you enter 1.21 for Nickels you're not. I know that if I divide the entered number by the integer of that number there should be no fraction.
Here is my code:
r1:=@ThisValue;
n:=@RightBack(@ThisName;"_");
v:=@If(n="Dollars";100;@If(n="Halves";50;@If(n="Quarters";25;@If(n="Dimes";10;@If(n="Nickels";5;r1)))));
@If(r1="";@Return(r1);@Success);
a1:=(r1*100)/v;
o2:=@Integer(a1);
o1:=a1-o2;
@If(o1=0;r1;@Prompt([Ok];n+" Error";"Incorrect value for "+n));
r1
------------
When I enter certain values, such as 1.20, I get my error message indication the entry is invalid when in fact it is.
The variables contain the following values (as they are presented in a @Prompt.
r1=1.20
n=Nickels
v=.05
a1=24
02=23
01=0.999999999999996

I assume this is because of some setting on the server.
What do I need to do to solve my problem?
Is there an @Command or a set of Script instructions?

Thansk in advance,
Richard

Answer : I need to know if I have a fraction.

Probably because you're truncating a1 with the call to @Integer.

Try using @Modulo to get the remainder instead of doing your own math.

@If(@Modulo(r1*100; v) != 0; @Prompt([OK]; n+" Error";"Incorrect value for "+n); "");