-86.13% is the change from 512 to 71
Calculation steps:
[( 71 - 512 ) ÷ 512] x 100 = -86.13%
Formula
Percentage change = [(71 - 512) / 512] x 100
Subtract the new number by the original number
71 - 512 = -441
-441 ÷ 512 = -0.861328125
-0.861328125 x 100 = -86.13%