-86.96% is the change from 836 to 109
Calculation steps:
[( 109 - 836 ) ÷ 836] x 100 = -86.96%
Formula
Percentage change = [(109 - 836) / 836] x 100
Subtract the new number by the original number
109 - 836 = -727
-727 ÷ 836 = -0.8696172248803827
-0.8696172248803827 x 100 = -86.96%