-82.81% is the change from 512 to 88
Calculation steps:
[( 88 - 512 ) ÷ 512] x 100 = -82.81%
Formula
Percentage change = [(88 - 512) / 512] x 100
Subtract the new number by the original number
88 - 512 = -424
-424 ÷ 512 = -0.828125
-0.828125 x 100 = -82.81%