-84.63% is the change from 527 to 81
Calculation steps:
[( 81 - 527 ) ÷ 527] x 100 = -84.63%
Formula
Percentage change = [(81 - 527) / 527] x 100
Subtract the new number by the original number
81 - 527 = -446
-446 ÷ 527 = -0.8462998102466793
-0.8462998102466793 x 100 = -84.63%