-18.16% is the change from 512 to 419
Calculation steps:
[( 419 - 512 ) ÷ 512] x 100 = -18.16%
Formula
Percentage change = [(419 - 512) / 512] x 100
Subtract the new number by the original number
419 - 512 = -93
-93 ÷ 512 = -0.181640625
-0.181640625 x 100 = -18.16%