-98.81% is the change from 505 to 6
Calculation steps:
[( 6 - 505 ) ÷ 505] x 100 = -98.81%
Formula
Percentage change = [(6 - 505) / 505] x 100
Subtract the new number by the original number
6 - 505 = -499
-499 ÷ 505 = -0.9881188118811881
-0.9881188118811881 x 100 = -98.81%