-30.5% is the change from 518 to 360
Calculation steps:
[( 360 - 518 ) ÷ 518] x 100 = -30.5%
Formula
Percentage change = [(360 - 518) / 518] x 100
Subtract the new number by the original number
360 - 518 = -158
-158 ÷ 518 = -0.305019305019305
-0.305019305019305 x 100 = -30.5%