-98.26% is the change from 517 to 9
Calculation steps:
[( 9 - 517 ) ÷ 517] x 100 = -98.26%
Formula
Percentage change = [(9 - 517) / 517] x 100
Subtract the new number by the original number
9 - 517 = -508
-508 ÷ 517 = -0.9825918762088974
-0.9825918762088974 x 100 = -98.26%