-34.75% is the change from 518 to 338
Calculation steps:
[( 338 - 518 ) ÷ 518] x 100 = -34.75%
Formula
Percentage change = [(338 - 518) / 518] x 100
Subtract the new number by the original number
338 - 518 = -180
-180 ÷ 518 = -0.3474903474903475
-0.3474903474903475 x 100 = -34.75%