-20.22% is the change from 836 to 667
Calculation steps:
[( 667 - 836 ) ÷ 836] x 100 = -20.22%
Formula
Percentage change = [(667 - 836) / 836] x 100
Subtract the new number by the original number
667 - 836 = -169
-169 ÷ 836 = -0.2021531100478469
-0.2021531100478469 x 100 = -20.22%