-39.45% is the change from 829 to 502
Calculation steps:
[( 502 - 829 ) ÷ 829] x 100 = -39.45%
Formula
Percentage change = [(502 - 829) / 829] x 100
Subtract the new number by the original number
502 - 829 = -327
-327 ÷ 829 = -0.3944511459589867
-0.3944511459589867 x 100 = -39.45%