-89.76% is the change from 791 to 81
Calculation steps:
[( 81 - 791 ) ÷ 791] x 100 = -89.76%
Formula
Percentage change = [(81 - 791) / 791] x 100
Subtract the new number by the original number
81 - 791 = -710
-710 ÷ 791 = -0.8975979772439949
-0.8975979772439949 x 100 = -89.76%