-97.51% is the change from 522 to 13
Calculation steps:
[( 13 - 522 ) ÷ 522] x 100 = -97.51%
Formula
Percentage change = [(13 - 522) / 522] x 100
Subtract the new number by the original number
13 - 522 = -509
-509 ÷ 522 = -0.975095785440613
-0.975095785440613 x 100 = -97.51%