-87.01% is the change from 993 to 129
Calculation steps:
[( 129 - 993 ) ÷ 993] x 100 = -87.01%
Formula
Percentage change = [(129 - 993) / 993] x 100
Subtract the new number by the original number
129 - 993 = -864
-864 ÷ 993 = -0.8700906344410876
-0.8700906344410876 x 100 = -87.01%