-30.47% is the change from 512 to 356
Calculation steps:
[( 356 - 512 ) ÷ 512] x 100 = -30.47%
Formula
Percentage change = [(356 - 512) / 512] x 100
Subtract the new number by the original number
356 - 512 = -156
-156 ÷ 512 = -0.3046875
-0.3046875 x 100 = -30.47%