-53.91% is the change from 512 to 236
Calculation steps:
[( 236 - 512 ) ÷ 512] x 100 = -53.91%
Formula
Percentage change = [(236 - 512) / 512] x 100
Subtract the new number by the original number
236 - 512 = -276
-276 ÷ 512 = -0.5390625
-0.5390625 x 100 = -53.91%