-86.6% is the change from 821 to 110
Calculation steps:
[( 110 - 821 ) ÷ 821] x 100 = -86.6%
Formula
Percentage change = [(110 - 821) / 821] x 100
Subtract the new number by the original number
110 - 821 = -711
-711 ÷ 821 = -0.8660170523751523
-0.8660170523751523 x 100 = -86.6%