-97.56% is the change from 409 to 10
Calculation steps:
[( 10 - 409 ) ÷ 409] x 100 = -97.56%
Formula
Percentage change = [(10 - 409) / 409] x 100
Subtract the new number by the original number
10 - 409 = -399
-399 ÷ 409 = -0.9755501222493888
-0.9755501222493888 x 100 = -97.56%