-89.59% is the change from 778 to 81
Calculation steps:
[( 81 - 778 ) ÷ 778] x 100 = -89.59%
Formula
Percentage change = [(81 - 778) / 778] x 100
Subtract the new number by the original number
81 - 778 = -697
-697 ÷ 778 = -0.8958868894601543
-0.8958868894601543 x 100 = -89.59%