-83.48% is the change from 993 to 164
Calculation steps:
[( 164 - 993 ) ÷ 993] x 100 = -83.48%
Formula
Percentage change = [(164 - 993) / 993] x 100
Subtract the new number by the original number
164 - 993 = -829
-829 ÷ 993 = -0.8348439073514602
-0.8348439073514602 x 100 = -83.48%