-99.22% is the change from 512 to 4
Calculation steps:
[( 4 - 512 ) ÷ 512] x 100 = -99.22%
Formula
Percentage change = [(4 - 512) / 512] x 100
Subtract the new number by the original number
4 - 512 = -508
-508 ÷ 512 = -0.9921875
-0.9921875 x 100 = -99.22%