-89.72% is the change from 788 to 81
Calculation steps:
[( 81 - 788 ) ÷ 788] x 100 = -89.72%
Formula
Percentage change = [(81 - 788) / 788] x 100
Subtract the new number by the original number
81 - 788 = -707
-707 ÷ 788 = -0.8972081218274112
-0.8972081218274112 x 100 = -89.72%