-85.16% is the change from 512 to 76
Calculation steps:
[( 76 - 512 ) ÷ 512] x 100 = -85.16%
Formula
Percentage change = [(76 - 512) / 512] x 100
Subtract the new number by the original number
76 - 512 = -436
-436 ÷ 512 = -0.8515625
-0.8515625 x 100 = -85.16%