-89.9% is the change from 723 to 73
Calculation steps:
[( 73 - 723 ) ÷ 723] x 100 = -89.9%
Formula
Percentage change = [(73 - 723) / 723] x 100
Subtract the new number by the original number
73 - 723 = -650
-650 ÷ 723 = -0.8990318118948825
-0.8990318118948825 x 100 = -89.9%