-40.79% is the change from 836 to 495
Calculation steps:
[( 495 - 836 ) ÷ 836] x 100 = -40.79%
Formula
Percentage change = [(495 - 836) / 836] x 100
Subtract the new number by the original number
495 - 836 = -341
-341 ÷ 836 = -0.40789473684210525
-0.40789473684210525 x 100 = -40.79%