-97.91% is the change from 430 to 9
Calculation steps:
[( 9 - 430 ) ÷ 430] x 100 = -97.91%
Formula
Percentage change = [(9 - 430) / 430] x 100
Subtract the new number by the original number
9 - 430 = -421
-421 ÷ 430 = -0.9790697674418605
-0.9790697674418605 x 100 = -97.91%