-2.54% is the change from 511 to 498
Calculation steps:
[( 498 - 511 ) ÷ 511] x 100 = -2.54%
Formula
Percentage change = [(498 - 511) / 511] x 100
Subtract the new number by the original number
498 - 511 = -13
-13 ÷ 511 = -0.025440313111545987
-0.025440313111545987 x 100 = -2.54%