-81.58% is the change from 836 to 154
Calculation steps:
[( 154 - 836 ) ÷ 836] x 100 = -81.58%
Formula
Percentage change = [(154 - 836) / 836] x 100
Subtract the new number by the original number
154 - 836 = -682
-682 ÷ 836 = -0.8157894736842105
-0.8157894736842105 x 100 = -81.58%