-97.79% is the change from 407 to 9
Calculation steps:
[( 9 - 407 ) ÷ 407] x 100 = -97.79%
Formula
Percentage change = [(9 - 407) / 407] x 100
Subtract the new number by the original number
9 - 407 = -398
-398 ÷ 407 = -0.9778869778869779
-0.9778869778869779 x 100 = -97.79%