-97.87% is the change from 422 to 9
Calculation steps:
[( 9 - 422 ) ÷ 422] x 100 = -97.87%
Formula
Percentage change = [(9 - 422) / 422] x 100
Subtract the new number by the original number
9 - 422 = -413
-413 ÷ 422 = -0.9786729857819905
-0.9786729857819905 x 100 = -97.87%