-55.08% is the change from 512 to 230
Calculation steps:
[( 230 - 512 ) ÷ 512] x 100 = -55.08%
Formula
Percentage change = [(230 - 512) / 512] x 100
Subtract the new number by the original number
230 - 512 = -282
-282 ÷ 512 = -0.55078125
-0.55078125 x 100 = -55.08%