-87.8% is the change from 836 to 102
Calculation steps:
[( 102 - 836 ) ÷ 836] x 100 = -87.8%
Formula
Percentage change = [(102 - 836) / 836] x 100
Subtract the new number by the original number
102 - 836 = -734
-734 ÷ 836 = -0.8779904306220095
-0.8779904306220095 x 100 = -87.8%