-89.43% is the change from 766 to 81
Calculation steps:
[( 81 - 766 ) ÷ 766] x 100 = -89.43%
Formula
Percentage change = [(81 - 766) / 766] x 100
Subtract the new number by the original number
81 - 766 = -685
-685 ÷ 766 = -0.8942558746736292
-0.8942558746736292 x 100 = -89.43%