-82.58% is the change from 465 to 81
Calculation steps:
[( 81 - 465 ) ÷ 465] x 100 = -82.58%
Formula
Percentage change = [(81 - 465) / 465] x 100
Subtract the new number by the original number
81 - 465 = -384
-384 ÷ 465 = -0.8258064516129032
-0.8258064516129032 x 100 = -82.58%