-98.83% is the change from 511 to 6
Calculation steps:
[( 6 - 511 ) ÷ 511] x 100 = -98.83%
Formula
Percentage change = [(6 - 511) / 511] x 100
Subtract the new number by the original number
6 - 511 = -505
-505 ÷ 511 = -0.9882583170254403
-0.9882583170254403 x 100 = -98.83%