-35.13% is the change from 800 to 519
Calculation steps:
[( 519 - 800 ) ÷ 800] x 100 = -35.13%
Formula
Percentage change = [(519 - 800) / 800] x 100
Subtract the new number by the original number
519 - 800 = -281
-281 ÷ 800 = -0.35125
-0.35125 x 100 = -35.13%