It's rounding (to 4 decimal digits) issue. Compare

SET DECIMALS TO 7
? n2/n1, NTOM(n2/n1), n2/n1 * fldcur, fldcur * n2/n1, fldcur * (n2/n1), n2 * fldcur / n1
? "Numeric (Round):    ", ROUND(n2/n1,4) * fldn, fldn * ROUND(n2/n1,4)

>It is expected that result of calculations may be slightly different depending on the initial precision, but the difference in tens units?
>Anyone can shed light on it?
>
>

>* Tested in versions VFP5, VFP7, VFP 9 and VFP 9 Sp1
>CLEAR
>CLOSE tables all
>CREATE CURSOR testcrs (fldn N(12,4), fldcur Y) 
>ln=300000
>
>INSERT INTO testcrs VALUES (ln,ln)
>n1=43.05
>n2=44.06
>
>?"Variable:         ", n2/n1 * ln, ln * n2/n1		&& ~same
>?"Numeric field:    ", n2/n1 * fldn, fldn * n2/n1	&& ~same
>
>?"Currency field:   ", n2/n1 * fldcur, fldcur * n2/n1     && 307050.0000,        307038.3275        different 
>?"Currency2Numeric: ", n2/n1 * MTON(fldcur), MTON(fldcur) * n2/n1  && ~same
>

>