Positions 41-42 are used to indicate the number of decimal positions in a numeric subfield or standalone field. If the field is non-float numeric, there must always be an entry in these positions. If there are no decimal positions enter a zero (0) in position 42. For example, an integer or unsigned field (type I or U in position 40) requires a zero for this entry.
This entry can only be supplied in combination with the TO/Length field. If the TO/Length field is blank, the value of this entry is defined somewhere else in the program (for example, through an externally described data base file).