-79.71% is the change from 409 to 83
Calculation steps:
[( 83 - 409 ) ÷ 409] x 100 = -79.71%
Formula
Percentage change = [(83 - 409) / 409] x 100
Subtract the new number by the original number
83 - 409 = -326
-326 ÷ 409 = -0.7970660146699267
-0.7970660146699267 x 100 = -79.71%