-89.6% is the change from 779 to 81
Calculation steps:
[( 81 - 779 ) ÷ 779] x 100 = -89.6%
Formula
Percentage change = [(81 - 779) / 779] x 100
Subtract the new number by the original number
81 - 779 = -698
-698 ÷ 779 = -0.8960205391527599
-0.8960205391527599 x 100 = -89.6%