-57.03% is the change from 512 to 220
Calculation steps:
[( 220 - 512 ) ÷ 512] x 100 = -57.03%
Formula
Percentage change = [(220 - 512) / 512] x 100
Subtract the new number by the original number
220 - 512 = -292
-292 ÷ 512 = -0.5703125
-0.5703125 x 100 = -57.03%