-97.68% is the change from 993 to 23
Calculation steps:
[( 23 - 993 ) ÷ 993] x 100 = -97.68%
Formula
Percentage change = [(23 - 993) / 993] x 100
Subtract the new number by the original number
23 - 993 = -970
-970 ÷ 993 = -0.9768378650553877
-0.9768378650553877 x 100 = -97.68%