-2.94% is the change from 511 to 496
Calculation steps:
[( 496 - 511 ) ÷ 511] x 100 = -2.94%
Formula
Percentage change = [(496 - 511) / 511] x 100
Subtract the new number by the original number
496 - 511 = -15
-15 ÷ 511 = -0.029354207436399216
-0.029354207436399216 x 100 = -2.94%