-97.35% is the change from 566 to 15
Calculation steps:
[( 15 - 566 ) ÷ 566] x 100 = -97.35%
Formula
Percentage change = [(15 - 566) / 566] x 100
Subtract the new number by the original number
15 - 566 = -551
-551 ÷ 566 = -0.9734982332155477
-0.9734982332155477 x 100 = -97.35%