-5.87% is the change from 511 to 481
Calculation steps:
[( 481 - 511 ) ÷ 511] x 100 = -5.87%
Formula
Percentage change = [(481 - 511) / 511] x 100
Subtract the new number by the original number
481 - 511 = -30
-30 ÷ 511 = -0.05870841487279843
-0.05870841487279843 x 100 = -5.87%