-90.46% is the change from 409 to 39
Calculation steps:
[( 39 - 409 ) ÷ 409] x 100 = -90.46%
Formula
Percentage change = [(39 - 409) / 409] x 100
Subtract the new number by the original number
39 - 409 = -370
-370 ÷ 409 = -0.9046454767726161
-0.9046454767726161 x 100 = -90.46%