-88.28% is the change from 691 to 81
Calculation steps:
[( 81 - 691 ) ÷ 691] x 100 = -88.28%
Formula
Percentage change = [(81 - 691) / 691] x 100
Subtract the new number by the original number
81 - 691 = -610
-610 ÷ 691 = -0.8827785817655571
-0.8827785817655571 x 100 = -88.28%