-97.84% is the change from 417 to 9
Calculation steps:
[( 9 - 417 ) ÷ 417] x 100 = -97.84%
Formula
Percentage change = [(9 - 417) / 417] x 100
Subtract the new number by the original number
9 - 417 = -408
-408 ÷ 417 = -0.9784172661870504
-0.9784172661870504 x 100 = -97.84%