-19.73% is the change from 512 to 411
Calculation steps:
[( 411 - 512 ) ÷ 512] x 100 = -19.73%
Formula
Percentage change = [(411 - 512) / 512] x 100
Subtract the new number by the original number
411 - 512 = -101
-101 ÷ 512 = -0.197265625
-0.197265625 x 100 = -19.73%