-31.64% is the change from 512 to 350
Calculation steps:
[( 350 - 512 ) ÷ 512] x 100 = -31.64%
Formula
Percentage change = [(350 - 512) / 512] x 100
Subtract the new number by the original number
350 - 512 = -162
-162 ÷ 512 = -0.31640625
-0.31640625 x 100 = -31.64%