-50.59% is the change from 512 to 253
Calculation steps:
[( 253 - 512 ) ÷ 512] x 100 = -50.59%
Formula
Percentage change = [(253 - 512) / 512] x 100
Subtract the new number by the original number
253 - 512 = -259
-259 ÷ 512 = -0.505859375
-0.505859375 x 100 = -50.59%