-97.7% is the change from 566 to 13
Calculation steps:
[( 13 - 566 ) ÷ 566] x 100 = -97.7%
Formula
Percentage change = [(13 - 566) / 566] x 100
Subtract the new number by the original number
13 - 566 = -553
-553 ÷ 566 = -0.9770318021201413
-0.9770318021201413 x 100 = -97.7%