-81.87% is the change from 993 to 180
Calculation steps:
[( 180 - 993 ) ÷ 993] x 100 = -81.87%
Formula
Percentage change = [(180 - 993) / 993] x 100
Subtract the new number by the original number
180 - 993 = -813
-813 ÷ 993 = -0.8187311178247734
-0.8187311178247734 x 100 = -81.87%