-99.5% is the change from 993 to 5
Calculation steps:
[( 5 - 993 ) ÷ 993] x 100 = -99.5%
Formula
Percentage change = [(5 - 993) / 993] x 100
Subtract the new number by the original number
5 - 993 = -988
-988 ÷ 993 = -0.9949647532729103
-0.9949647532729103 x 100 = -99.5%