-85.48% is the change from 558 to 81
Calculation steps:
[( 81 - 558 ) ÷ 558] x 100 = -85.48%
Formula
Percentage change = [(81 - 558) / 558] x 100
Subtract the new number by the original number
81 - 558 = -477
-477 ÷ 558 = -0.8548387096774194
-0.8548387096774194 x 100 = -85.48%