-35.25% is the change from 800 to 518
Calculation steps:
[( 518 - 800 ) ÷ 800] x 100 = -35.25%
Formula
Percentage change = [(518 - 800) / 800] x 100
Subtract the new number by the original number
518 - 800 = -282
-282 ÷ 800 = -0.3525
-0.3525 x 100 = -35.25%