-39.15% is the change from 825 to 502
Calculation steps:
[( 502 - 825 ) ÷ 825] x 100 = -39.15%
Formula
Percentage change = [(502 - 825) / 825] x 100
Subtract the new number by the original number
502 - 825 = -323
-323 ÷ 825 = -0.39151515151515154
-0.39151515151515154 x 100 = -39.15%