-96.87% is the change from 511 to 16
Calculation steps:
[( 16 - 511 ) ÷ 511] x 100 = -96.87%
Formula
Percentage change = [(16 - 511) / 511] x 100
Subtract the new number by the original number
16 - 511 = -495
-495 ÷ 511 = -0.9686888454011742
-0.9686888454011742 x 100 = -96.87%