-97.71% is the change from 393 to 9
Calculation steps:
[( 9 - 393 ) ÷ 393] x 100 = -97.71%
Formula
Percentage change = [(9 - 393) / 393] x 100
Subtract the new number by the original number
9 - 393 = -384
-384 ÷ 393 = -0.9770992366412213
-0.9770992366412213 x 100 = -97.71%