-36.91% is the change from 512 to 323
Calculation steps:
[( 323 - 512 ) ÷ 512] x 100 = -36.91%
Formula
Percentage change = [(323 - 512) / 512] x 100
Subtract the new number by the original number
323 - 512 = -189
-189 ÷ 512 = -0.369140625
-0.369140625 x 100 = -36.91%