-84.48% is the change from 522 to 81
Calculation steps:
[( 81 - 522 ) ÷ 522] x 100 = -84.48%
Formula
Percentage change = [(81 - 522) / 522] x 100
Subtract the new number by the original number
81 - 522 = -441
-441 ÷ 522 = -0.8448275862068966
-0.8448275862068966 x 100 = -84.48%