-97.1% is the change from 725 to 21
Calculation steps:
[( 21 - 725 ) ÷ 725] x 100 = -97.1%
Formula
Percentage change = [(21 - 725) / 725] x 100
Subtract the new number by the original number
21 - 725 = -704
-704 ÷ 725 = -0.9710344827586207
-0.9710344827586207 x 100 = -97.1%