-30.27% is the change from 512 to 357
Calculation steps:
[( 357 - 512 ) ÷ 512] x 100 = -30.27%
Formula
Percentage change = [(357 - 512) / 512] x 100
Subtract the new number by the original number
357 - 512 = -155
-155 ÷ 512 = -0.302734375
-0.302734375 x 100 = -30.27%