-99.41% is the change from 511 to 3
Calculation steps:
[( 3 - 511 ) ÷ 511] x 100 = -99.41%
Formula
Percentage change = [(3 - 511) / 511] x 100
Subtract the new number by the original number
3 - 511 = -508
-508 ÷ 511 = -0.9941291585127201
-0.9941291585127201 x 100 = -99.41%