-87.71% is the change from 993 to 122
Calculation steps:
[( 122 - 993 ) ÷ 993] x 100 = -87.71%
Formula
Percentage change = [(122 - 993) / 993] x 100
Subtract the new number by the original number
122 - 993 = -871
-871 ÷ 993 = -0.877139979859013
-0.877139979859013 x 100 = -87.71%