-5.09% is the change from 511 to 485
Calculation steps:
[( 485 - 511 ) ÷ 511] x 100 = -5.09%
Formula
Percentage change = [(485 - 511) / 511] x 100
Subtract the new number by the original number
485 - 511 = -26
-26 ÷ 511 = -0.050880626223091974
-0.050880626223091974 x 100 = -5.09%