-45.51% is the change from 512 to 279
Calculation steps:
[( 279 - 512 ) ÷ 512] x 100 = -45.51%
Formula
Percentage change = [(279 - 512) / 512] x 100
Subtract the new number by the original number
279 - 512 = -233
-233 ÷ 512 = -0.455078125
-0.455078125 x 100 = -45.51%