-3.58% is the change from 531 to 512
Calculation steps:
[( 512 - 531 ) ÷ 531] x 100 = -3.58%
Formula
Percentage change = [(512 - 531) / 531] x 100
Subtract the new number by the original number
512 - 531 = -19
-19 ÷ 531 = -0.035781544256120526
-0.035781544256120526 x 100 = -3.58%