-81.21% is the change from 431 to 81
Calculation steps:
[( 81 - 431 ) ÷ 431] x 100 = -81.21%
Formula
Percentage change = [(81 - 431) / 431] x 100
Subtract the new number by the original number
81 - 431 = -350
-350 ÷ 431 = -0.8120649651972158
-0.8120649651972158 x 100 = -81.21%