-11.79% is the change from 577 to 509
Calculation steps:
[( 509 - 577 ) ÷ 577] x 100 = -11.79%
Formula
Percentage change = [(509 - 577) / 577] x 100
Subtract the new number by the original number
509 - 577 = -68
-68 ÷ 577 = -0.11785095320623917
-0.11785095320623917 x 100 = -11.79%