-86.75% is the change from 581 to 77
Calculation steps:
[( 77 - 581 ) ÷ 581] x 100 = -86.75%
Formula
Percentage change = [(77 - 581) / 581] x 100
Subtract the new number by the original number
77 - 581 = -504
-504 ÷ 581 = -0.8674698795180723
-0.8674698795180723 x 100 = -86.75%