-95.51% is the change from 512 to 23
Calculation steps:
[( 23 - 512 ) ÷ 512] x 100 = -95.51%
Formula
Percentage change = [(23 - 512) / 512] x 100
Subtract the new number by the original number
23 - 512 = -489
-489 ÷ 512 = -0.955078125
-0.955078125 x 100 = -95.51%