-87.78% is the change from 581 to 71
Calculation steps:
[( 71 - 581 ) ÷ 581] x 100 = -87.78%
Formula
Percentage change = [(71 - 581) / 581] x 100
Subtract the new number by the original number
71 - 581 = -510
-510 ÷ 581 = -0.8777969018932874
-0.8777969018932874 x 100 = -87.78%