-38.83% is the change from 824 to 504
Calculation steps:
[( 504 - 824 ) ÷ 824] x 100 = -38.83%
Formula
Percentage change = [(504 - 824) / 824] x 100
Subtract the new number by the original number
504 - 824 = -320
-320 ÷ 824 = -0.3883495145631068
-0.3883495145631068 x 100 = -38.83%