-39.64% is the change from 835 to 504
Calculation steps:
[( 504 - 835 ) ÷ 835] x 100 = -39.64%
Formula
Percentage change = [(504 - 835) / 835] x 100
Subtract the new number by the original number
504 - 835 = -331
-331 ÷ 835 = -0.3964071856287425
-0.3964071856287425 x 100 = -39.64%