-88.81% is the change from 724 to 81
Calculation steps:
[( 81 - 724 ) ÷ 724] x 100 = -88.81%
Formula
Percentage change = [(81 - 724) / 724] x 100
Subtract the new number by the original number
81 - 724 = -643
-643 ÷ 724 = -0.888121546961326
-0.888121546961326 x 100 = -88.81%