-98.75% is the change from 720 to 9
Calculation steps:
[( 9 - 720 ) ÷ 720] x 100 = -98.75%
Formula
Percentage change = [(9 - 720) / 720] x 100
Subtract the new number by the original number
9 - 720 = -711
-711 ÷ 720 = -0.9875
-0.9875 x 100 = -98.75%
Example