-81.35% is the change from 429 to 80
Calculation steps:
[( 80 - 429 ) ÷ 429] x 100 = -81.35%
Formula
Percentage change = [(80 - 429) / 429] x 100
Subtract the new number by the original number
80 - 429 = -349
-349 ÷ 429 = -0.8135198135198135
-0.8135198135198135 x 100 = -81.35%