-82.35% is the change from 459 to 81
Calculation steps:
[( 81 - 459 ) ÷ 459] x 100 = -82.35%
Formula
Percentage change = [(81 - 459) / 459] x 100
Subtract the new number by the original number
81 - 459 = -378
-378 ÷ 459 = -0.8235294117647058
-0.8235294117647058 x 100 = -82.35%