-97.85% is the change from 419 to 9
Calculation steps:
[( 9 - 419 ) ÷ 419] x 100 = -97.85%
Formula
Percentage change = [(9 - 419) / 419] x 100
Subtract the new number by the original number
9 - 419 = -410
-410 ÷ 419 = -0.9785202863961814
-0.9785202863961814 x 100 = -97.85%