-90.63% is the change from 993 to 93
Calculation steps:
[( 93 - 993 ) ÷ 993] x 100 = -90.63%
Formula
Percentage change = [(93 - 993) / 993] x 100
Subtract the new number by the original number
93 - 993 = -900
-900 ÷ 993 = -0.9063444108761329
-0.9063444108761329 x 100 = -90.63%