-84.83% is the change from 534 to 81
Calculation steps:
[( 81 - 534 ) ÷ 534] x 100 = -84.83%
Formula
Percentage change = [(81 - 534) / 534] x 100
Subtract the new number by the original number
81 - 534 = -453
-453 ÷ 534 = -0.848314606741573
-0.848314606741573 x 100 = -84.83%