-98.9% is the change from 728 to 8
Calculation steps:
[( 8 - 728 ) ÷ 728] x 100 = -98.9%
Formula
Percentage change = [(8 - 728) / 728] x 100
Subtract the new number by the original number
8 - 728 = -720
-720 ÷ 728 = -0.989010989010989
-0.989010989010989 x 100 = -98.9%