-0.1% is the change from 993 to 992
Calculation steps:
[( 992 - 993 ) ÷ 993] x 100 = -0.1%
Formula
Percentage change = [(992 - 993) / 993] x 100
Subtract the new number by the original number
992 - 993 = -1
-1 ÷ 993 = -0.0010070493454179255
-0.0010070493454179255 x 100 = -0.1%