-30.4% is the change from 829 to 577
Calculation steps:
[( 577 - 829 ) ÷ 829] x 100 = -30.4%
Formula
Percentage change = [(577 - 829) / 829] x 100
Subtract the new number by the original number
577 - 829 = -252
-252 ÷ 829 = -0.3039806996381182
-0.3039806996381182 x 100 = -30.4%