-87.81% is the change from 993 to 121
Calculation steps:
[( 121 - 993 ) ÷ 993] x 100 = -87.81%
Formula
Percentage change = [(121 - 993) / 993] x 100
Subtract the new number by the original number
121 - 993 = -872
-872 ÷ 993 = -0.878147029204431
-0.878147029204431 x 100 = -87.81%