-84.35% is the change from 409 to 64
Calculation steps:
[( 64 - 409 ) ÷ 409] x 100 = -84.35%
Formula
Percentage change = [(64 - 409) / 409] x 100
Subtract the new number by the original number
64 - 409 = -345
-345 ÷ 409 = -0.843520782396088
-0.843520782396088 x 100 = -84.35%