-40.02% is the change from 837 to 502
Calculation steps:
[( 502 - 837 ) ÷ 837] x 100 = -40.02%
Formula
Percentage change = [(502 - 837) / 837] x 100
Subtract the new number by the original number
502 - 837 = -335
-335 ÷ 837 = -0.4002389486260454
-0.4002389486260454 x 100 = -40.02%