-0.3% is the change from 993 to 990
Calculation steps:
[( 990 - 993 ) ÷ 993] x 100 = -0.3%
Formula
Percentage change = [(990 - 993) / 993] x 100
Subtract the new number by the original number
990 - 993 = -3
-3 ÷ 993 = -0.0030211480362537764
-0.0030211480362537764 x 100 = -0.3%