-68.55% is the change from 512 to 161
Calculation steps:
[( 161 - 512 ) ÷ 512] x 100 = -68.55%
Formula
Percentage change = [(161 - 512) / 512] x 100
Subtract the new number by the original number
161 - 512 = -351
-351 ÷ 512 = -0.685546875
-0.685546875 x 100 = -68.55%