-9.88% is the change from 577 to 520
Calculation steps:
[( 520 - 577 ) ÷ 577] x 100 = -9.88%
Formula
Percentage change = [(520 - 577) / 577] x 100
Subtract the new number by the original number
520 - 577 = -57
-57 ÷ 577 = -0.09878682842287695
-0.09878682842287695 x 100 = -9.88%