-40.07% is the change from 836 to 501
Calculation steps:
[( 501 - 836 ) ÷ 836] x 100 = -40.07%
Formula
Percentage change = [(501 - 836) / 836] x 100
Subtract the new number by the original number
501 - 836 = -335
-335 ÷ 836 = -0.4007177033492823
-0.4007177033492823 x 100 = -40.07%