-98.82% is the change from 509 to 6
Calculation steps:
[( 6 - 509 ) ÷ 509] x 100 = -98.82%
Formula
Percentage change = [(6 - 509) / 509] x 100
Subtract the new number by the original number
6 - 509 = -503
-503 ÷ 509 = -0.9882121807465619
-0.9882121807465619 x 100 = -98.82%