-79.22% is the change from 409 to 85
Calculation steps:
[( 85 - 409 ) ÷ 409] x 100 = -79.22%
Formula
Percentage change = [(85 - 409) / 409] x 100
Subtract the new number by the original number
85 - 409 = -324
-324 ÷ 409 = -0.7921760391198044
-0.7921760391198044 x 100 = -79.22%