-89.89% is the change from 801 to 81
Calculation steps:
[( 81 - 801 ) ÷ 801] x 100 = -89.89%
Formula
Percentage change = [(81 - 801) / 801] x 100
Subtract the new number by the original number
81 - 801 = -720
-720 ÷ 801 = -0.898876404494382
-0.898876404494382 x 100 = -89.89%