-10.94% is the change from 512 to 456
Calculation steps:
[( 456 - 512 ) ÷ 512] x 100 = -10.94%
Formula
Percentage change = [(456 - 512) / 512] x 100
Subtract the new number by the original number
456 - 512 = -56
-56 ÷ 512 = -0.109375
-0.109375 x 100 = -10.94%