-44.34% is the change from 512 to 285
Calculation steps:
[( 285 - 512 ) ÷ 512] x 100 = -44.34%
Formula
Percentage change = [(285 - 512) / 512] x 100
Subtract the new number by the original number
285 - 512 = -227
-227 ÷ 512 = -0.443359375
-0.443359375 x 100 = -44.34%