-86.51% is the change from 571 to 77
Calculation steps:
[( 77 - 571 ) ÷ 571] x 100 = -86.51%
Formula
Percentage change = [(77 - 571) / 571] x 100
Subtract the new number by the original number
77 - 571 = -494
-494 ÷ 571 = -0.8651488616462347
-0.8651488616462347 x 100 = -86.51%