-81.44% is the change from 431 to 80
Calculation steps:
[( 80 - 431 ) ÷ 431] x 100 = -81.44%
Formula
Percentage change = [(80 - 431) / 431] x 100
Subtract the new number by the original number
80 - 431 = -351
-351 ÷ 431 = -0.814385150812065
-0.814385150812065 x 100 = -81.44%