-29.55% is the change from 819 to 577
Calculation steps:
[( 577 - 819 ) ÷ 819] x 100 = -29.55%
Formula
Percentage change = [(577 - 819) / 819] x 100
Subtract the new number by the original number
577 - 819 = -242
-242 ÷ 819 = -0.2954822954822955
-0.2954822954822955 x 100 = -29.55%