-4.89% is the change from 511 to 486
Calculation steps:
[( 486 - 511 ) ÷ 511] x 100 = -4.89%
Formula
Percentage change = [(486 - 511) / 511] x 100
Subtract the new number by the original number
486 - 511 = -25
-25 ÷ 511 = -0.04892367906066536
-0.04892367906066536 x 100 = -4.89%