-99.41% is the change from 512 to 3
Calculation steps:
[( 3 - 512 ) ÷ 512] x 100 = -99.41%
Formula
Percentage change = [(3 - 512) / 512] x 100
Subtract the new number by the original number
3 - 512 = -509
-509 ÷ 512 = -0.994140625
-0.994140625 x 100 = -99.41%