-75.55% is the change from 409 to 100
Calculation steps:
[( 100 - 409 ) ÷ 409] x 100 = -75.55%
Formula
Percentage change = [(100 - 409) / 409] x 100
Subtract the new number by the original number
100 - 409 = -309
-309 ÷ 409 = -0.7555012224938875
-0.7555012224938875 x 100 = -75.55%