Division 5.6 F509A: area wrongly declared

The difference between the area declared and that found. Overstatement being the area declared exceeding the area found and reported with a positive figure. Understatement being the area found exceeding the area declared and reported with a negative figure.

Required format: +99 … 99.99 or -99 … 99.99, where 9 stands for a digit from 0 to 9.