-98.75% is the change from 721 to 9
Calculation steps:
[( 9 - 721 ) ÷ 721] x 100 = -98.75%
Formula
Percentage change = [(9 - 721) / 721] x 100
Subtract the new number by the original number
9 - 721 = -712
-712 ÷ 721 = -0.9875173370319001
-0.9875173370319001 x 100 = -98.75%