-84.09% is the change from 993 to 158
Calculation steps:
[( 158 - 993 ) ÷ 993] x 100 = -84.09%
Formula
Percentage change = [(158 - 993) / 993] x 100
Subtract the new number by the original number
158 - 993 = -835
-835 ÷ 993 = -0.8408862034239678
-0.8408862034239678 x 100 = -84.09%