-39.23% is the change from 836 to 508
Calculation steps:
[( 508 - 836 ) ÷ 836] x 100 = -39.23%
Formula
Percentage change = [(508 - 836) / 836] x 100
Subtract the new number by the original number
508 - 836 = -328
-328 ÷ 836 = -0.3923444976076555
-0.3923444976076555 x 100 = -39.23%