-36.72% is the change from 512 to 324
Calculation steps:
[( 324 - 512 ) ÷ 512] x 100 = -36.72%
Formula
Percentage change = [(324 - 512) / 512] x 100
Subtract the new number by the original number
324 - 512 = -188
-188 ÷ 512 = -0.3671875
-0.3671875 x 100 = -36.72%