-97.92% is the change from 720 to 15
Calculation steps:
[( 15 - 720 ) ÷ 720] x 100 = -97.92%
Formula
Percentage change = [(15 - 720) / 720] x 100
Subtract the new number by the original number
15 - 720 = -705
-705 ÷ 720 = -0.9791666666666666
-0.9791666666666666 x 100 = -97.92%