-97.37% is the change from 570 to 15
Calculation steps:
[( 15 - 570 ) ÷ 570] x 100 = -97.37%
Formula
Percentage change = [(15 - 570) / 570] x 100
Subtract the new number by the original number
15 - 570 = -555
-555 ÷ 570 = -0.9736842105263158
-0.9736842105263158 x 100 = -97.37%