-97.93% is the change from 724 to 15
Calculation steps:
[( 15 - 724 ) ÷ 724] x 100 = -97.93%
Formula
Percentage change = [(15 - 724) / 724] x 100
Subtract the new number by the original number
15 - 724 = -709
-709 ÷ 724 = -0.9792817679558011
-0.9792817679558011 x 100 = -97.93%