-88.56% is the change from 577 to 66
Calculation steps:
[( 66 - 577 ) ÷ 577] x 100 = -88.56%
Formula
Percentage change = [(66 - 577) / 577] x 100
Subtract the new number by the original number
66 - 577 = -511
-511 ÷ 577 = -0.8856152512998267
-0.8856152512998267 x 100 = -88.56%