-39.88% is the change from 835 to 502
Calculation steps:
[( 502 - 835 ) ÷ 835] x 100 = -39.88%
Formula
Percentage change = [(502 - 835) / 835] x 100
Subtract the new number by the original number
502 - 835 = -333
-333 ÷ 835 = -0.39880239520958083
-0.39880239520958083 x 100 = -39.88%