-39.83% is the change from 836 to 503
Calculation steps:
[( 503 - 836 ) ÷ 836] x 100 = -39.83%
Formula
Percentage change = [(503 - 836) / 836] x 100
Subtract the new number by the original number
503 - 836 = -333
-333 ÷ 836 = -0.39832535885167464
-0.39832535885167464 x 100 = -39.83%