-89.93% is the change from 993 to 100
Calculation steps:
[( 100 - 993 ) ÷ 993] x 100 = -89.93%
Formula
Percentage change = [(100 - 993) / 993] x 100
Subtract the new number by the original number
100 - 993 = -893
-893 ÷ 993 = -0.8992950654582075
-0.8992950654582075 x 100 = -89.93%