-97.91% is the change from 431 to 9
Calculation steps:
[( 9 - 431 ) ÷ 431] x 100 = -97.91%
Formula
Percentage change = [(9 - 431) / 431] x 100
Subtract the new number by the original number
9 - 431 = -422
-422 ÷ 431 = -0.9791183294663574
-0.9791183294663574 x 100 = -97.91%