-98.25% is the change from 513 to 9
Calculation steps:
[( 9 - 513 ) ÷ 513] x 100 = -98.25%
Formula
Percentage change = [(9 - 513) / 513] x 100
Subtract the new number by the original number
9 - 513 = -504
-504 ÷ 513 = -0.9824561403508771
-0.9824561403508771 x 100 = -98.25%