-86.91% is the change from 512 to 67
Calculation steps:
[( 67 - 512 ) ÷ 512] x 100 = -86.91%
Formula
Percentage change = [(67 - 512) / 512] x 100
Subtract the new number by the original number
67 - 512 = -445
-445 ÷ 512 = -0.869140625
-0.869140625 x 100 = -86.91%