-99.23% is the change from 517 to 4
Calculation steps:
[( 4 - 517 ) ÷ 517] x 100 = -99.23%
Formula
Percentage change = [(4 - 517) / 517] x 100
Subtract the new number by the original number
4 - 517 = -513
-513 ÷ 517 = -0.9922630560928434
-0.9922630560928434 x 100 = -99.23%