-1.35% is the change from 519 to 512
Calculation steps:
[( 512 - 519 ) ÷ 519] x 100 = -1.35%
Formula
Percentage change = [(512 - 519) / 519] x 100
Subtract the new number by the original number
512 - 519 = -7
-7 ÷ 519 = -0.01348747591522158
-0.01348747591522158 x 100 = -1.35%