-96.86% is the change from 510 to 16
Calculation steps:
[( 16 - 510 ) ÷ 510] x 100 = -96.86%
Formula
Percentage change = [(16 - 510) / 510] x 100
Subtract the new number by the original number
16 - 510 = -494
-494 ÷ 510 = -0.9686274509803922
-0.9686274509803922 x 100 = -96.86%