-38.19% is the change from 838 to 518
Calculation steps:
[( 518 - 838 ) ÷ 838] x 100 = -38.19%
Formula
Percentage change = [(518 - 838) / 838] x 100
Subtract the new number by the original number
518 - 838 = -320
-320 ÷ 838 = -0.3818615751789976
-0.3818615751789976 x 100 = -38.19%