-32.42% is the change from 512 to 346
Calculation steps:
[( 346 - 512 ) ÷ 512] x 100 = -32.42%
Formula
Percentage change = [(346 - 512) / 512] x 100
Subtract the new number by the original number
346 - 512 = -166
-166 ÷ 512 = -0.32421875
-0.32421875 x 100 = -32.42%