-81.61% is the change from 435 to 80
Calculation steps:
[( 80 - 435 ) ÷ 435] x 100 = -81.61%
Formula
Percentage change = [(80 - 435) / 435] x 100
Subtract the new number by the original number
80 - 435 = -355
-355 ÷ 435 = -0.8160919540229885
-0.8160919540229885 x 100 = -81.61%