-36.75% is the change from 819 to 518
Calculation steps:
[( 518 - 819 ) ÷ 819] x 100 = -36.75%
Formula
Percentage change = [(518 - 819) / 819] x 100
Subtract the new number by the original number
518 - 819 = -301
-301 ÷ 819 = -0.36752136752136755
-0.36752136752136755 x 100 = -36.75%